$$7000 { \left(1+ \frac{ 12 }{ 100 } \right) }^{ 2 }$$
$\frac{43904}{5}=8780.8$
$$7000\left(1+\frac{3}{25}\right)^{2}$$
$$7000\times \left(\frac{28}{25}\right)^{2}$$
$$7000\times \frac{784}{625}$$
$$\frac{43904}{5}$$
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$\frac{2 ^ {7} \cdot 7 ^ {3}}{5} = 8780\frac{4}{5} = 8780.8$
