There are 257 roosters and 268 hens in the farm, placed in 35 cages on average. How many chickens are in each cage?
饲养场养了257只公鸡，268只母鸡，平均放在35个笼子里．每个笼子有多少只鸡？
<gadget id="calculator">257 + 268</gadget>
<output>525</output>

<gadget id="calculator">525 / 35</gadget>
<output>15</output>

<result>15</result>