body {
    font-family: sans-serif;
    text-align: center;
    margin: 20px;
}

label {
    display: inline-block;
    width: 100px;
    text-align: right;
    margin-right: 10px;
}

input[type="number"] {
    width: 100px;
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #3e8e41;
}

#result {
    font-weight: bold;
    margin-top: 20px;
}