$$\frac{ 130 }{ 40 } \times \frac{ 18 }{ 5 }$$
$\frac{117}{10}=11.7$
$$\frac{13}{4}\times \frac{18}{5}$$
$$\frac{13\times 18}{4\times 5}$$
$$\frac{234}{20}$$
$$\frac{117}{10}$$
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$\frac{3 ^ {2} \cdot 13}{2 \cdot 5} = 11\frac{7}{10} = 11.7$
