I know what you mean, but the grammar feels intuitive and the GUI is really clear, so it's pretty easy to extrapolate once you get a few things. For example, you want to calculate a price for three items at $425 in British pounds:

$425 * 3 in £

Once you've got "in £" you know it's available anywhere. I use it a lot for unit conversion too:

3 inches in mm

The other thing I use a lot is referencing other lines. So this will output £4:

£10 + 2

line1 / 3