Uncle Zhang harvested 96 tons of rice this year, an increase of 20% over last year. How many tons of rice were harvested last year?
张大伯今年收稻谷96吨，比去年增产了二成，去年收稻谷多少吨？
<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">96 / (6/5)</gadget>
<output>80</output>

<result>80</result>