There is a large grain grower in Hehan Village, who harvested 20,000kg of rice the year before last, an increase of 15% compared to the previous year. How much rice did this big grain grower harvest last year?
河汉村有个种粮大户，前年收稻谷20000kg，去年比前年增产了一成五．这个种粮大户去年收了多少稻谷？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">20_000 * (23/20)</gadget>
<output>23_000</output>

<result>23_000</result>