For use with big integers. Ex. -2419354838 / -1303434343
```javascript
const remainder = (dividend, divisor) => {
    return divisor == 0 ? "NaN" : dividend - (Math.floor(dividend / divisor) * divisor);
};
remainder(-2419354838, -1303434343) // -1115920495
```

For use big small integers. Ex. 1000 / 400
```javascript
const remainder = (dividend, divisor) => {
  return divisor === 0 ? "NaN" : dividend - divisor * ~~(dividend / divisor);
};

remainder(1000,400) // 400
```