Xiao Ming's family fed 40 chickens this year, four times that of last year. How many chickens did Xiao Ming's family feed last year?
小明家今年喂了40只鸡，是去年的4倍，小明家去年喂了多少只只鸡．
<gadget id="calculator">40 / 4</gadget>
<output>10</output>

<result>10</result>