"Write" a simple calculator without writing a single line of code
J, 7 questions/answers, none about J
echo a%b[echo a*b[echo a-b[echo a+b[b=:?2147483647 [a=:?2147483647

It's a pretty damn cheap way to do it, I'm not gonna lie. Here are the SO answers I used:

echo
This answer

+, -, * and %
This question

?
This answer

[
This answer

= and :
This community wiki question

2147483647
This answer

foo
This answer


I renamed variable foo as a and b in the code.