Answer
$10530$.
Work Step by Step
$\frac{61}{810}, \frac{37}{1170}$
$810 = 2 \cdot 3 \cdot 3 \cdot 3 \cdot 3 \cdot 5$
$1170 = 2 \cdot 3 \cdot 3 \cdot 5 \cdot 13 $
LCM $= 2 \cdot 3 \cdot 3 \cdot 3 \cdot 3 \cdot 5 \cdot 13 = 10530$.
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