The fruit shop shipped 10 boxes of apples, each weighing 25 kilograms. After selling some, the remaining 180 kilograms were sold. How many kilograms were sold?
水果店运来10箱苹果，每箱25千克，卖出一些后，余下180千克，卖出了多少千克？
<gadget id="calculator">25 * 10</gadget>
<output>250</output>

<gadget id="calculator">250 - 180</gadget>
<output>70</output>

<result>70</result>