The farm raised 2,009 pigs this year, which is 220 fewer than three times the number of pigs raised last year. How many pigs were raised last year?
饲养场今年养猪2009头，比去年养猪头数的3倍少220头，去年养猪多少头？
<gadget id="calculator">2_009 + 220</gadget>
<output>2_229</output>

<gadget id="calculator">2_229 / 3</gadget>
<output>743</output>

<result>743</result>