Function returns Memes

Somebody's calculator function clearly got confused with their first programming lesson! Instead of returning 35 (7×5), this calculator proudly outputs "Hello World" like it just graduated from Coding 101. Classic case of a variable type mismatch—calculator.js expected numbers but got existential instead. The dev probably reused that "Hello World" function they wrote 5 minutes earlier and forgot to change the return value. That's what happens when you code at 3 AM fueled by nothing but energy drinks and stackoverflow copy-pasta.