The number 30 is removed from level
and its sine, .5, is returned to
level 1. The previous result, 38, remains in level 2.
Calculate 38 x .5.
The numbers 38 and .5 are removed from levels 1 and 2, and their
product, 19, is returned to level 1.
This completes the calculation:
23) x sin 30°
To summarize, here's a general procedure for the calculation you just
1. Key a number into the
I to put a number on the
3. Press the key to execute the command. (If the command doesn't
appear on the keyboard, select the
that contains the com-
mand, and press the
below the appropriate
The previous example demonstrated that all calculations occur on the
stack. To highlight this idea, you pressed
I to put every number
on the stack. In practice,
you need to press
only to separate two
numbers keyed in sequentially-in
the example, to separate 15 and 23.
Try repeating the example, omitting the second and third
1: Getting Started