There are 24 bottles of mineral water per box, and each bottle is 3 yuan. At the sports meeting, Mr. Zhang bought 2 boxes of mineral water for the students. How much did they spend in total?
每箱矿泉水24瓶，每瓶3元，运动会上，张老师给同学们买了2箱矿泉水，共花了多少钱？
<gadget id="calculator">3 * 24 * 2</gadget>
<output>144</output>

<result>144</result>