body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.dropdown {
    margin-bottom: 10px;
}

.dropdown label {
    display: block;
}

.dropdown select {
    width: 200px;
    padding: 5px;
}

.number-input {
    margin-top: 20px;
}

.number-input label {
    display: block;
}

.number-input input {
    width: 100px;
    padding: 5px;
}

.submit-button {
    margin-top: 20px;
}

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

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