输入存款金额，7日年化收益率，输出每日利息

完整源码如下：

import tkinter as tk
from tkinter import messagebox

def calculate_interest():
    deposit = float(entry_deposit.get())
    interest_rate = float(entry_interest_rate.get())

    daily_interest_rate = interest_rate / 365  # 计算每日利率
    daily_interest = round(deposit * daily_interest_rate, 2)  # 计算每日收益并保留两位小数

    result_label.config(text=f"每天的收益为：{daily_interest}")

# 创建窗口
window = tk.Tk()
window.title("存款利息计算器")
window.geometry("400x200")  # 设置窗口大小

# 创建标签和输入框
label_deposit = tk.Label(window, text="存款金额：")
label_deposit.pack()
entry_deposit = tk.Entry(window)
entry_deposit.pack()

label_interest_rate = tk.Label(window, text="7日年化收益率：")
label_interest_rate.pack()
entry_interest_rate = tk.Entry(window)
entry_interest_rate.pack()

# 创建按钮
button_calculate = tk.Button(window, text="计算", command=calculate_interest)
button_calculate.pack()

# 创建结果标签
result_label = tk.Label(window, text="每天的收益为：")
result_label.pack()

# 运行窗口
window.mainloop()

运行结果如下：

10万和1000万的情况