$$\frac{120}{124}\div\frac{128}{136}\div\frac{140}{148}$$
$\frac{1887}{1736}\approx 1.086981567$
$$\frac{\frac{120}{124}\times 148}{\frac{128}{136}\times 140}$$
$$\frac{\frac{30}{31}\times 148}{\frac{128}{136}\times 140}$$
$$\frac{\frac{30\times 148}{31}}{\frac{128}{136}\times 140}$$
$$\frac{\frac{4440}{31}}{\frac{128}{136}\times 140}$$
$$\frac{\frac{4440}{31}}{\frac{16}{17}\times 140}$$
$$\frac{\frac{4440}{31}}{\frac{16\times 140}{17}}$$
$$\frac{\frac{4440}{31}}{\frac{2240}{17}}$$
$$\frac{4440}{31}\times \frac{17}{2240}$$
$$\frac{4440\times 17}{31\times 2240}$$
$$\frac{75480}{69440}$$
$$\frac{1887}{1736}$$
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$\frac{3 \cdot 17 \cdot 37}{2 ^ {3} \cdot 7 \cdot 31} = 1\frac{151}{1736} = 1.0869815668202765$
