A farmer harvested 3,600 kilograms of soybeans last year, which was 20% more than the previous year. How many kilograms of soybeans were harvested last year?
一农户前年收大豆3600千克，去年比前年增产二成，去年收大豆多少千克？
<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_600 * (6/5)</gadget>
<output>4_320</output>

<result>4_320</result>