JSFiddle - React, Tailwind, and code Playground

JavaScript

var execute = function() {
    var num = [8, 1, 9, 2, 4, 3, 6];
    
    var ab = num[0] * num[1];
    var fg = num[5] * num[6];
    var abc = num[0] * num[1] * num[2];
    var cde = num[2] * num[3] * num[4];
    var efg = num[4] * num[5] * num[6];
    var c = abc/ab;
    var e = efg/fg;
    var ce = c * e
    var d = abc/ce;
    
    console.log(d);
}();