### kphToMph

Convert kilometers/hour to miles/hour.

Multiply the constant of proportionality with the argument.

```js
const kphToMph = (kph) => 0.621371192 * kph;
```

```js
kphToMph(10); //16.09344000614692
kphToMph(345.4); //138.24264965280207
```