(1/5) of 4 meters is equal to ((())/(())) of 1 meter; how much (1/20) is (9/20) hours.
4米的(1/5)和1米的((())/(()))相等；多少的(1/20)是(9/20)小时．
<gadget id="calculator">9 / 20</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(9/20) / (1/20)</gadget>
<output>9</output>

<result>9</result>