The cafeteria brought in a batch of rice and ate 520 kilograms, and the rest was twice as much. How many kilograms of rice are left?
食堂运进一批大米，吃了520千克，剩下的是吃了的2倍，剩下多少千克大米？
<gadget id="calculator">520 * 2</gadget>
<output>1_040</output>

<result>1_040</result>