numeral(0.0).add(numeral(0.000002 * 0.24).value()).value() returns 0 instead of 4.8e-7

Hi Team,

Wondering how to use this library if I would like the following code to return me expected value?

```
numeral(0.0).add(numeral(0.000002 * 0.24).value()).value()
```

Currently it returns `0`, while I would expect it to be `4.8e-7`.

Thanks