The store sells 240 kg of apples and three times as many pears as apples. How many kilograms more pears are sold than apples?
商店卖出苹果240千克，卖出的梨是苹果的3倍．卖出的梨比苹果多多少千克？
<gadget id="calculator">240 * 3</gadget>
<output>720</output>

<gadget id="calculator">720 - 240</gadget>
<output>480</output>

<result>480</result>