$$\frac{ \sqrt{ 196 } \times \sqrt{ 19.6 } }{ \sqrt{ 0.196 } \sqrt{ 1.96 } } \times { \left( \frac{ 5 }{ 7 } \right) }^{ -2 }$$
$196$
$$\frac{14\sqrt{19.6}}{\sqrt{0.196}\sqrt{1.96}}\times \left(\frac{5}{7}\right)^{-2}$$
$$\frac{14\sqrt{19.6}}{\sqrt{0.38416}}\times \left(\frac{5}{7}\right)^{-2}$$
$$\frac{14\sqrt{19.6}\sqrt{0.38416}}{\left(\sqrt{0.38416}\right)^{2}}\times \left(\frac{5}{7}\right)^{-2}$$
$$\frac{14\sqrt{19.6}\sqrt{0.38416}}{0.38416}\times \left(\frac{5}{7}\right)^{-2}$$
$$\frac{14\sqrt{7.529536}}{0.38416}\times \left(\frac{5}{7}\right)^{-2}$$
$$\frac{14\times 2.744}{0.38416}\times \left(\frac{5}{7}\right)^{-2}$$
$$\frac{38.416}{0.38416}\times \left(\frac{5}{7}\right)^{-2}$$
$$\frac{3841600}{38416}\times \left(\frac{5}{7}\right)^{-2}$$
$$100\times \left(\frac{5}{7}\right)^{-2}$$
$$100\times \frac{49}{25}$$
$$196$$
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$2^{2}\times 7^{2}$
