The whole class of 46 people went rowing, and took 12 boats in total. Among them, the big boats each took 5 people, and the small boats each took 3 people. How many of them are there in the big boats?
全班46人去划船，共乘12只船，其中大船每船均坐5人，小船每船均坐3人，其中大船有几只？
<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<gadget id="calculator">46 - 36</gadget>
<output>10</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<result>5</result>