The fruit shop shipped 3600 kilograms of fruit, after how many kilograms were sold, the remaining is exactly 1 ton.
水果店运来3600千克水果，售出多少千克千克后，剩下的正好是1吨．
<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">3_600 - 1_000</gadget>
<output>2_600</output>

<result>2_600</result>