这是一个简单易用的投资收益计算工具，可以帮助您计算固定投资金额在特定年化收益率和投资期限下的收益情况。
计算结果包括投资本金、利息收益和总收益。
This is a simple and easy-to-use investment return calculator that helps you calculate returns
based on a fixed investment amount, annual return rate, and investment period.
Results include principal, interest earned, and total return.
使用方法：
How to use:
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输入投资本金金额
Enter the investment amount
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输入预期年化收益率
Enter the expected annual return rate
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输入投资期限（年）
Enter the investment period (in years)
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点击"计算收益"按钮查看结果
Click "Calculate Return" to see the results
特点：
Features:
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支持任意投资金额的计算
Supports calculation for any investment amount
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精确的收益计算
Accurate return calculation
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清晰的结果展示
Clear result presentation
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响应式设计，适配各种设备
Responsive design for all devices
