Class 3 and Class 1 held a party. Teacher Li bought 3 boxes of beverages, each with 16 bottles, and each bottle cost 3 yuan. If you pay 150 yuan, how much should you get back?
三1班召开联欢会，李老师买了3箱饮料，每箱16瓶，每瓶3元．付150元，应找回多少元？
<gadget id="calculator">3 * 16 * 3</gadget>
<output>144</output>

<gadget id="calculator">150 - 144</gadget>
<output>6</output>

<result>6</result>