Grandpa’s family harvested 3.6 tons of apples this year, an increase of 20% compared to last year. How many tons of apples did Grandpa’s produce last year?
爷爷家今年收苹果3.6吨，比去年增产了二成，爷爷家去年苹果产量是多少吨？
<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">3.6 / (6/5)</gadget>
<output>3</output>

<result>3</result>