A pig farm raised 925 pigs. After selling some, there were 418 pigs left. How many pigs were sold? (answer in two ways)
一个养猪场养猪925头，卖出一些后，还剩418头，卖出了多少头猪？(用两种方法解答)
<gadget id="calculator">925 - 418</gadget>
<output>507</output>

<result>507</result>