Guest, your English is a bit off. I put this into a Grammarly document, and I got your question now!
The question, is Grammarly is correct, is: How many ways are there to choose french fries and potatoes if there are 5 french fries and 2 potatoes?
Well, you can choose 0, 1, 2, 3, 4, 5, or 6 french fries. You can also pick 0, 1, or 2 potatoes.
The number of choices are $7 \cdot 3 = \boxed{21}$
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