Uncle Liu's family harvested 6,000 kilograms of rice the year before last, which was 30% more than last year. How many kilograms of rice was harvested last year?
刘大爷家前年收稻谷6000千克，去年比前年增产三成．去年收稻谷多少千克．
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 + (3/10)</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">6_000 * (13/10)</gadget>
<output>7_800</output>

<result>7_800</result>