For a fraction, first divide it by 2, then divide it by 3, the result is (3/5), what is the fraction.
一个分数，先用2约分，再用3约分，结果是(3/5)，这个分数是多少．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">9 / 15</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>