There are 600 kilograms of apples in the store, which have been sold for 3 days, and 120 kilograms are sold every day. How many kilograms of apples are left?
商店原有苹果600千克，已经卖了3天，每天卖120千克，还剩苹果多少千克？
<gadget id="calculator">120 * 3</gadget>
<output>360</output>

<gadget id="calculator">600 - 360</gadget>
<output>240</output>

<result>240</result>