The two kittens each caught 26 mice, and the sheriff black cat caught 39 mice. How many mice did they catch in total?
两只小猫各抓了26只老鼠，黑猫警长抓了39只老鼠．它们一共抓了多少只老鼠？
<gadget id="calculator">26 * 2</gadget>
<output>52</output>

<gadget id="calculator">52 + 39</gadget>
<output>91</output>

<result>91</result>