A test field harvested 20 tons of wheat last year, and this year's output has increased by 25% compared with last year. How many tons has the output increased this year compared to last year?
一块试验田，去年收小麦20吨，今年的产量比去年增加了二成五．今年产量比去年增加了多少吨．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 * (1/4)</gadget>
<output>5</output>

<result>5</result>