The fruit shop shipped 20 boxes of pears, each weighing 25 kg. Sell 325 kilograms, how many kilograms are left?
水果店运来20箱梨，每箱25千克．卖出325千克，还剩多少千克？
<gadget id="calculator">25 * 20</gadget>
<output>500</output>

<gadget id="calculator">500 - 325</gadget>
<output>175</output>

<result>175</result>