How many (1/5) are there in 1, there are 10 (2/(())).
1里有多少个(1/5)，有10个(2/(()))．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / (1/5) / 1</gadget>
<output>5</output>

<result>5</result>