Divide a fraction, use 2 once, use 3 once, and use 5 once to get (2/3), what is the original score?
把一个分数约分，用2约了一次、用3约了一次、用5约了一次后得到(2/3)，原来这个分数是多少？
<gadget id="calculator">3 * 5 * 3 * 2</gadget>
<output>90</output>

<gadget id="calculator">2 / 90</gadget>
<output>1/45 = around 0.022222</output>

<gadget id="calculator">2 * 5 * 3 * (1/45)</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>