$${ 2 }^{ 2 } / { 5 }^{ 2 } 70/0.5$$
$22.4$
$$\frac{\frac{4}{5^{2}}\times 70}{0.5}$$
$$\frac{\frac{4}{25}\times 70}{0.5}$$
$$\frac{\frac{4\times 70}{25}}{0.5}$$
$$\frac{\frac{280}{25}}{0.5}$$
$$\frac{\frac{56}{5}}{0.5}$$
$$\frac{56}{5\times 0.5}$$
$$\frac{56}{2.5}$$
$$\frac{560}{25}$$
$$\frac{112}{5}$$
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$\frac{7 \cdot 2 ^ {4}}{5} = 22\frac{2}{5} = 22.4$
