Answer
Inputting 315 / 0 should cause an answer of "undefined"/"undef" or cause the calculator to produce an error.
Work Step by Step
1) Enter 315
2) Press the divide key. (Looks like ÷ or /)
3) Enter 0
4) Press Enter/Solve/=
5) The display should either produce an error or read "undefined" or "undef". This is because it is impossible to divide by 0.