This year's wheat output is 20% higher than last year's. If last year's wheat output was 800 tons, how much is this year's wheat output increased?
今年的小麦产量比去年小麦产量增长二成，若去年小麦产是800吨，则今年小麦的产量增加了多少吨．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">800 * (1/5)</gadget>
<output>160</output>

<result>160</result>