The fruit store has bought 4 baskets of apples, each with 40 kg, and there are 240 kg left. How many kilograms of apples did the fruit store have?
水果店已经买掉4筐苹果，每筐40千克，还剩240千克，水果店原来有苹果多少千克？
<gadget id="calculator">40 * 4</gadget>
<output>160</output>

<gadget id="calculator">160 + 240</gadget>
<output>400</output>

<result>400</result>