HP F2226A - 48GII Graphic Calculator User Manual page 151

To calculate a division, say, 3250 mi / 50 h, enter it as
(3250_mi)/(50_h) `:
which transformed to SI units, with function UBASE, produces:
Addition and subtraction can be performed, in ALG mode, without using
parentheses, e.g., 5 m + 3200 mm, can be entered simply as 5_m +
3200_mm `:
More complicated expression require the use of parentheses, e.g.,
(12_mm)*(1_cm^2)/(2_s) `:
Stack calculations in the RPN mode, do not require you to enclose the
different terms in parentheses, e.g.,
12_m ` 1.5_yd ` *
3250_mi ` 50_h ` /
These operations produce the following output:
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