The output of oil crops in Lizhuang increased by 20% this year compared with last year. The output this year is 24 tons, how many tons was the output last year?
李庄今年油料作物产量比去年增加二成．今年产量是24吨，去年产量是多少吨？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">24 / (6/5)</gadget>
<output>20</output>

<result>20</result>