/**** 
* Classes
****/ 
var CalculatorButton = Container.expand(function (label, type, callback) {
	var self = Container.call(this);
	var buttonType = type || 'number';
	var buttonShape;
	if (buttonType === 'operator') {
		buttonShape = self.attachAsset('operatorButton', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else if (buttonType === 'equals') {
		buttonShape = self.attachAsset('equalsButton', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else if (buttonType === 'clear') {
		buttonShape = self.attachAsset('clearButton', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else {
		buttonShape = self.attachAsset('calculatorButton', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	}
	var buttonText = new Text2(label, {
		size: 60,
		fill: buttonType === 'number' ? "#000000" : "#ffffff"
	});
	buttonText.anchor.set(0.5, 0.5);
	self.addChild(buttonText);
	self.callback = callback;
	self.down = function (x, y, obj) {
		buttonShape.alpha = 0.7;
		if (self.callback) {
			self.callback();
		}
	};
	self.up = function (x, y, obj) {
		buttonShape.alpha = 1.0;
	};
	return self;
});
var CurrencyDisplay = Container.expand(function (currencyCode, rate) {
	var self = Container.call(this);
	self.currencyCode = currencyCode;
	self.rate = rate;
	self.currencyLabel = new Text2(currencyCode + ':', {
		size: 40,
		fill: 0xFFFFFF
	});
	self.currencyLabel.anchor.set(0, 0.5);
	self.addChild(self.currencyLabel);
	self.valueText = new Text2('0.00', {
		size: 40,
		fill: 0xFFFFFF
	});
	self.valueText.anchor.set(1, 0.5);
	self.valueText.x = 300;
	self.addChild(self.valueText);
	self.updateValue = function (usdAmount) {
		var convertedAmount = usdAmount * self.rate;
		if (self.currencyCode === 'JPY') {
			self.valueText.setText(Math.round(convertedAmount).toString());
		} else {
			self.valueText.setText(convertedAmount.toFixed(2));
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2c3e50
});

/**** 
* Game Code
****/ 
// Calculator state
var currentDisplay = '0';
var previousValue = 0;
var currentOperation = null;
var waitingForNewInput = false;
// Currency exchange rates (mock data - in real app would fetch from API)
var exchangeRates = {
	'EUR': 0.85,
	'GBP': 0.73,
	'JPY': 110.25,
	'CAD': 1.25,
	'AUD': 1.35,
	'CHF': 0.92
};
// Display background
var displayBg = game.addChild(LK.getAsset('displayBackground', {
	anchorX: 0.5,
	anchorY: 0
}));
displayBg.x = 1024;
displayBg.y = 200;
// Main display text
var displayText = new Text2(currentDisplay, {
	size: 80,
	fill: 0xFFFFFF
});
displayText.anchor.set(1, 0.5);
displayText.x = 1900;
displayText.y = 300;
game.addChild(displayText);
// USD label
var usdLabel = new Text2('USD', {
	size: 50,
	fill: 0xFFFFFF
});
usdLabel.anchor.set(0, 0.5);
usdLabel.x = 200;
usdLabel.y = 300;
game.addChild(usdLabel);
// Currency conversion background
var currencyBg = game.addChild(LK.getAsset('currencyBackground', {
	anchorX: 0.5,
	anchorY: 1
}));
currencyBg.x = 1024;
currencyBg.y = 2732;
// Currency displays
var currencyDisplays = [];
var currencies = Object.keys(exchangeRates);
for (var i = 0; i < currencies.length; i++) {
	var currency = currencies[i];
	var display = new CurrencyDisplay(currency, exchangeRates[currency]);
	display.x = 200 + i % 3 * 600;
	display.y = 2732 - 350 + Math.floor(i / 3) * 80;
	currencyDisplays.push(display);
	game.addChild(display);
}
// Calculator functions
function updateDisplay() {
	displayText.setText(currentDisplay);
	var numericValue = parseFloat(currentDisplay) || 0;
	for (var i = 0; i < currencyDisplays.length; i++) {
		currencyDisplays[i].updateValue(numericValue);
	}
}
function inputNumber(num) {
	if (waitingForNewInput) {
		currentDisplay = num;
		waitingForNewInput = false;
	} else {
		if (currentDisplay === '0') {
			currentDisplay = num;
		} else {
			currentDisplay += num;
		}
	}
	updateDisplay();
}
function inputDecimal() {
	if (waitingForNewInput) {
		currentDisplay = '0.';
		waitingForNewInput = false;
	} else if (currentDisplay.indexOf('.') === -1) {
		currentDisplay += '.';
	}
	updateDisplay();
}
function inputOperation(op) {
	if (currentOperation !== null && !waitingForNewInput) {
		calculate();
	}
	previousValue = parseFloat(currentDisplay);
	currentOperation = op;
	waitingForNewInput = true;
}
function calculate() {
	var current = parseFloat(currentDisplay);
	var result = previousValue;
	switch (currentOperation) {
		case '+':
			result = previousValue + current;
			break;
		case '-':
			result = previousValue - current;
			break;
		case '×':
			result = previousValue * current;
			break;
	}
	currentDisplay = result.toString();
	if (currentDisplay.length > 12) {
		currentDisplay = result.toExponential(6);
	}
	currentOperation = null;
	waitingForNewInput = true;
	updateDisplay();
}
function clearAll() {
	currentDisplay = '0';
	previousValue = 0;
	currentOperation = null;
	waitingForNewInput = false;
	updateDisplay();
}
// Create calculator buttons
var buttons = [];
// Number buttons (0-9)
var numberLayout = [['7', '8', '9'], ['4', '5', '6'], ['1', '2', '3'], ['0', '.', '=']];
for (var row = 0; row < numberLayout.length; row++) {
	for (var col = 0; col < numberLayout[row].length; col++) {
		var buttonLabel = numberLayout[row][col];
		var buttonType = 'number';
		var callback;
		if (buttonLabel === '=') {
			buttonType = 'equals';
			callback = calculate;
		} else if (buttonLabel === '.') {
			callback = inputDecimal;
		} else {
			callback = function (num) {
				return function () {
					inputNumber(num);
				};
			}(buttonLabel);
		}
		var button = new CalculatorButton(buttonLabel, buttonType, callback);
		button.x = 300 + col * 200;
		button.y = 500 + row * 140;
		buttons.push(button);
		game.addChild(button);
	}
}
// Operation buttons
var operations = [{
	label: '×',
	op: '×'
}, {
	label: '-',
	op: '-'
}, {
	label: '+',
	op: '+'
}];
for (var i = 0; i < operations.length; i++) {
	var op = operations[i];
	var opButton = new CalculatorButton(op.label, 'operator', function (operation) {
		return function () {
			inputOperation(operation);
		};
	}(op.op));
	opButton.x = 900;
	opButton.y = 500 + i * 140;
	buttons.push(opButton);
	game.addChild(opButton);
}
// Clear button
var clearBtn = new CalculatorButton('C', 'clear', clearAll);
clearBtn.x = 1200;
clearBtn.y = 500;
buttons.push(clearBtn);
game.addChild(clearBtn);
// Initialize display
updateDisplay();

===================================================================
--- original.js
+++ change.js
@@ -189,13 +189,8 @@
 			break;
 		case '×':
 			result = previousValue * current;
 			break;
-		case '÷':
-			if (current !== 0) {
-				result = previousValue / current;
-			}
-			break;
 	}
 	currentDisplay = result.toString();
 	if (currentDisplay.length > 12) {
 		currentDisplay = result.toExponential(6);
@@ -240,11 +235,8 @@
 	}
 }
 // Operation buttons
 var operations = [{
-	label: '÷',
-	op: '÷'
-}, {
 	label: '×',
 	op: '×'
 }, {
 	label: '-',