A case of 12 bottles of beer costs 3 yuan per bottle. Xiao Ming bought 5 boxes, how much should he pay in total?
一箱啤酒12瓶，每瓶3元钱．小明买了5箱，一共要付多少钱？
<gadget id="calculator">3 * 12 * 5</gadget>
<output>180</output>

<result>180</result>