JSFiddle - React, Tailwind, and code Playground

by CoolBuys1290

HTML

I'm trying to integrate millivolts, microvolts, volts to milliamps, microamps, amps using code that isn't really long like I've done with distance calculations. The code also has to incorporate 3 select boxes with 3 input boxes. Previously, I would assign
a value to the option value such as
<option value="0.0254">Inches</option>, but there has to be a more efficient solution than the code I have already. I don't want to repeat the Javascript code for the distance example, because surely there's a more efficient method to do this without having to type all those
if else if statements.

<!DOCTYPE html>
<html>

<body>

  <p>From:</p>
  <select style="float:left" id="MetricAndImperial1" class="js-example-basic-single select2-container" oninput="Run2()" onchange="Run2()">
        <option value="0.0254">Inches</option>
        <option value="0.3048">Feet</option>
        <option value="0.9144">Yards</option>
        <option value="1609.344">Miles</option>
        <option value="1852">Nautical Miles</option>
        <option value="5.092">Rods</option>
        <option value="201.68">Furlongs</option>
        <option value="0.1016">Hands</option>
        <option value="1.828800000565">Fathoms</option>
        <option value="5556.0000046893">Leagues</option>
        <option value="1000000000000000000000000">Yottameter</option>
        <option value="1000000000000000000000">Zettameter</option>
        <option value="1000000000000000000">Exameter</option>
        <option value="1000000000000000">Petameter</option>
        <option value="1000000000000">Terameter</option>
        <option value="1000000000">Gigameter</option>
        <option value="1000000">Megameter</option>
        <option value="1000">Kilometer</option>
        <option value="100">Hectometer</option>
        <option value="10">Decameter</option>
        <option value="1">Meters</option>
        <option value=".1">Decimeter</option>
        <option value=".01">Centimeter</option>
        <option...