Beijing Zoo kept 15 monkeys in 5 iron cages, but the number of monkeys in each cage was different. The cage with the largest number had the most monkeys.
北京动物园在5个铁笼里共养了15只猴子，但每个笼子里的猴子只数都不一样，最多的那个笼子里最多有多少只猴子．
<gadget id="calculator">1 + 2 + 3 + 4</gadget>
<output>10</output>

<gadget id="calculator">15 - 10</gadget>
<output>5</output>

<result>5</result>