$${ 9 }^{ 2 } / { 2 }^{ 2 } { 7 }^{ 2 } { 0 }^{ 2 }$$
$0$
$$\frac{81}{2^{2}}\times 7^{2}\times 0^{2}$$
$$\frac{81}{4}\times 7^{2}\times 0^{2}$$
$$\frac{81}{4}\times 49\times 0^{2}$$
$$\frac{81\times 49}{4}\times 0^{2}$$
$$\frac{3969}{4}\times 0^{2}$$
$$\frac{3969}{4}\times 0$$
$$0$$
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