Xiao Ming's family harvested 2,000 kilograms of rice last year, 200 kilograms more than three times that of corn. How many kilograms of corn did Xiao Ming's family collect last year?
小明家去年收稻谷2000千克，比玉米的3倍多200千克．小明家去年收玉米多少千克？
<gadget id="calculator">2_000 - 200</gadget>
<output>1_800</output>

<gadget id="calculator">1_800 / 3</gadget>
<output>600</output>

<result>600</result>