2026 Fermat Problem 9

A square has an area of 10. Each of its side lengths is multiplied by the same positive integer to produce a new square. Which of the following could be the area of the new square?

\textbf{(A)}\ 60\quad \textbf{(B)}\ 70\quad \textbf{(C)}\ 80\quad \textbf{(D)}\ 90\quad \textbf{(E)}\ 100

If there are no answer choices shown, enter a numerical answer.

Full credit to this problem is given to the CEMC, you may view all Fermat contests here.