<!DOCTYPE html>
<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>
</body>
</html>
<script>
function fn(a){
return function(b){
return function(c){
console.log(a * b * c);
}
}
}
fn(2)(3)(4);