How do you use pascal calculator?

To use a Pascal calculator, first, ensure you understand the input format, which usually requires you to enter values for "n" (the total number of items) and "r" (the number of items to choose). You can typically input these values into the calculator's interface, then press the calculate button to obtain the binomial coefficient, represented as ( C(n, r) ) or ( \binom{n}{r} ). The calculator will display the result, which represents the number of combinations possible for selecting ( r ) items from ( n ) items without regard to the order.