questions

**Ciel function in Math step doesn't seem to work**

Ciel function in Math step doesn't seem to work.

```
__.values(VERTEX_PROPERTY_RATE)
.as('rate')                                   .select('product')
.select('price')
.as('price')
.select('product')
.select('quantity')
.math('price * _')
// .math('ciel _')
.math('_ * rate')
```

This works perfectly fine (returns a number), but when I uncomment the ciel step, then I get a weird error that ciel only takes number values and I'm passing it null

are you getting a `NullPointerException`? or some other error that refers to your using a null?

```Server error: {"detailedMessage":"The variable ciel for math() step must resolve to a Number - it is instead of type null with value null"``` <@765668250331381840>

`ciel` is mistyped. i believe you want `ceil`. the error is stating that `math()` does not recognize `ciel` as a function essentially and is treating it as a variable. since there is no definition for that it is `null` and `math()` doesn't like that.