The fruit shop shipped 25 boxes of apples, each weighing 18 kg. Sell 256 kilograms, how many kilograms are left?
水果店运来25箱苹果，每箱18千克．卖出256千克，还剩多少千克？
<gadget id="calculator">18 * 25</gadget>
<output>450</output>

<gadget id="calculator">450 - 256</gadget>
<output>194</output>

<result>194</result>