https://fcc-metr-imp-converter.glitch.me
/api/convert?input=4gal
/api/convert?input=1/2km
/api/convert?input=5.4/3lbs
/api/convert?input=kg
{initNum: 3.1, initUnit: 'mi', returnNum: 5.0000008, returnUnit: 'km', string: '3.1 miles converts to 5.00002 kilometers'}