Xiaohua's family harvested 4,000 kilograms of rice the year before last. Last year, due to insect damage, the production was 35% lower than the previous year. How many kilograms of rice did Xiaohua's family harvest last year?
小华家前年收了4000千克稻谷，去年因为虫害，比前年减产三成五，去年小华家收稻谷多少千克？
<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">1 - (7/20)</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">4_000 * (13/20)</gadget>
<output>2_600</output>

<result>2_600</result>