Here you have a snippet with the answer (it’s really simple, it is not how a good script should be done), just run it to see how it works if you can’t get over your homework:
document.querySelector("button").addEventListener("click", ()=> {
var inputN = document.querySelectorAll("input")[0].value;
var inputM = document.querySelectorAll("input")[1].value;
if (isNaN(inputN) || isNaN(inputM)) {
document.querySelector("#text").innerHTML= "Your input is not a number!";
} else {
var result = 0;
while ((inputN % inputM) == 0 && inputN > 0) {
result++;
inputN = inputN - inputM;
}
document.querySelector("#text").innerHTML= "You can divide the numbers " + result + " times";
}
})<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<div id=inputn> <input type="text"> </div>
<div id=inputm> <input type="text"> </div>
<div id=button><button>submit</button> </div>
<div id=text>
<p></p>
</div>
</body>
<script></script>
</html>