Implicit integer conversions behave weirdly

```python
import "stdlib/io.jou"
import "stdlib/limits.jou"

def main() -> int:
    minutes = 3
    if minutes <= UINT32_MAX / 60:
        printf("ok\n")
    else:
        printf("wat?\n")
    return 0
```

Expected result: `ok`
Actual result: `wat?`

I think `UINT32_MAX` is implicitly converted to `int`.