JSFiddle - React, Tailwind, and code Playground

HTML

<span id ="Weekly" class="ServerData" data-tag="WeeklyCarSales">**30**</span>
<span id ="Monthly" class="ServerData" data-tag="DailyCarSales">**6**</span>

JavaScript

function divide(n1, n2) {
    var ans = n1 / n2;
    document.write(" " + ans + "<BR>");
    return ans;
}

var a = parseInt($("#Weekly.ServerData").text().replace(/\*/gmi, ""), 10)
  , b = parseInt($("#Monthly.ServerData").text().replace(/\*/gmi, ""), 10);

divide(a, b);