Description for Correct answer:
\( \left(25\right)^{3} \times \left(4\right)^{3} - 800^{2} = \left(?\right)^{2} \)

\( 15625 \times 64 - 640000 = \left(?\right)^{2} \)

\( 1000000 - 640000 = \left(?\right)^{2} \)

\( 360000 = \left(?\right)^{2} \)

? = 600