The fruit shop shipped 650 kilograms of melons. 15 boxes have been sold, each weighing 25kg, how many kilograms are left?
水果店运来650千克香瓜．已经卖了15箱，每箱重25千克，还剩多少千克？
<gadget id="calculator">15 * 25</gadget>
<output>375</output>

<gadget id="calculator">650 - 375</gadget>
<output>275</output>

<result>275</result>