nice code

I have a doubt, any number multiplied by zero is zero right? So why if I multiply the (n) word by zero should it return the word repeated once, like in this test:

For st = URM TablOWGQ HZPsTi IbmbWpqxYiMgoqisB u pHED NEbayRuBNKlVUNJJJ gjOnsc DTSZhHUpWekhmwXM uxSKQnTIZvZbsZRZFHDSxeo hAiTw evuqwSp hx lodhkRBkhK kZvVlR RousUDn u MxHXFibTMLcnN JsXZNzvMS VxwQGRMmjsFNVXKLZwj cCqXZyZZzkAgqCup mPunCNX uNRWDLwLQWgHVxk cCUUFqHWtVTJPeIfUu SulqDQVvVR CPPgVHfoGRG TikvQYoJGjZ q vjTZkAvPq
loc = 20
num = 0 <----------------------------------------------
Result is not what expected
Expected
:
to equal
: cCqXZyZZzkAgqCup <-----------------------

when you think that there is not room from improvement, but then you see this!! This is art!!