The fruit shop brings in 16 boxes of oranges, each weighing 25 kilograms. After selling some, there are 125 kilograms left. How many kilograms are sold?
水果店运进16箱桔子，每箱重25千克，卖出一些后还剩125千克，卖出多少千克？
<gadget id="calculator">25 * 16</gadget>
<output>400</output>

<gadget id="calculator">400 - 125</gadget>
<output>275</output>

<result>275</result>