There are 7 rabbits and 7 chickens in a cage. How many legs do the rabbits and chickens have?
笼子里有7只兔和7只鸡，兔和鸡一共有多少条腿？
<gadget id="calculator">4 * 7</gadget>
<output>28</output>

<gadget id="calculator">2 * 7</gadget>
<output>14</output>

<gadget id="calculator">28 + 14</gadget>
<output>42</output>

<result>42</result>