When simplifying a fraction, use 2 for three times, use 5 for one time to get (3/8), the original fraction is ((())/(())).
化简一个分数时，用2约了三次，用5约了一次得(3/8)，原分数是((())/(()))．
<gadget id="calculator">3 * 2 * 2 * 2 * 5</gadget>
<output>120</output>

<gadget id="calculator">8 * 2 * 2 * 2 * 5</gadget>
<output>320</output>

<gadget id="calculator">120 / 320</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>