js-tasks/task4/js/main.js

const input_number = document.querySelector("#input-number");
const output = document.querySelector("#output");
const btn_submit = document.querySelector("#btn-submit");

function miles_to_km(miles)
{
    return miles * 1.609344;
}

btn_submit.addEventListener("click", (event) => {
    const number = input_number.value;
    const result = miles_to_km(number);
    output.textContent = `Result: ${result}`;
});