import streamlit as st

st.title('Calculator')

num1 = st.number_input('Enter the first number:')
num2 = st.number_input('Enter the second number:')

operation = st.selectbox('Select operation', ['Add', 'Subtract', 'Multiply', 'Divide'])

if st.button('Calculate'):
    if operation == 'Add':
        result = num1 + num2
    elif operation == 'Subtract':
        result = num1 - num2
    elif operation == 'Multiply':
        result = num1 * num2
    elif operation == 'Divide':
        if num2 == 0:
            result = 'Cannot divide by zero!'
        else:
            result = num1 / num2

    st.write('Result:', result)