The output of a wheat field this year is 840 kg, which is an increase of 20% compared with last year. (Ask and answer math questions about percentages by yourself).
一块小麦地，今年产量是840千克，比去年增产了两成．(自己提出有关百分数的数学问题并解答)．
<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">840 / (6/5)</gadget>
<output>700</output>

<result>700</result>