Imagine a situation where a store launches a promotion: when purchasing 5 items at $17 each, the 6th item is free.

A total of 27 people participated in the promotion.

Calculate the total revenue from this promotion using multiplication.

This task (and the next ones) use a small helper function to check your answer automatically. You don't need to understand function or return yet — you will learn both later in the course. Focus only on this line:

return ___;

Replace ___ with your calculation using multiplication. For example:

return 2 * 10;

Just write your final answer as a math expression after return. The same pattern will be used in the next challenges, so no need to worry.