Incubate chicks with eggs, 247 chicks hatched in the morning, and 129 more chicks hatched in the afternoon than in the morning. How many chicks were hatched in total on this day?
用鸡蛋孵小鸡，上午孵出了247只小鸡，下午比上午多孵了129只小鸡，这一天一共孵出多少个小鸡？
<gadget id="calculator">247 + 129 + 247</gadget>
<output>623</output>

<result>623</result>