With the following:

```
4.pow(2)
```

I get:

```
error: no method named `pow` found for type `_` in the current scope
```

I have to be more explicit about it, e.g.:

```
4_i32.pow(2)
```

With floats, I get a similar problem (and solution), where:

```
4.0.powf(2.0)
```

Must also be explicit:

```
4.0_f64.powf(2.0)
```