40 \(\frac{\sqrt{224 \cdot 16}}{\sqrt{56}}\) ;

40. \(\frac{\sqrt{224 \cdot 16}}{\sqrt{56}}\) = \(\frac{\sqrt{224} \cdot \sqrt{16}}{\sqrt{56}}\) = \(\frac{\sqrt{4 \cdot 56} \cdot 4}{\sqrt{56}}\) = \(\frac{2 \sqrt{56} \cdot 4}{\sqrt{56}}\) = 2 \cdot 4 = 8