The fruit shop ships 20 boxes of pears, each box weighs 30 kilograms, and sells 325 kilograms. How many kilograms are left?
水果店运来20箱梨，每箱30千克，卖出325千克，还剩多少千克？
<gadget id="calculator">30 * 20</gadget>
<output>600</output>

<gadget id="calculator">600 - 325</gadget>
<output>275</output>

<result>275</result>