multiplying a number with the output of a variable

I have a variable which contains the product of some values, I want to multiply that product with another number. How can i do it please?

[John D'Errico]

x*5

There. I multiplied x by 5. What is the question here?

[amna chaudhary]

It was giving me a wrong answer but i just figured out that a loop in my code was wrong. thanks a lot :)