Kindergarten buys 12 packs of towels, 5 packs each, and each pack costs 3 yuan. How much does it cost in total?
幼儿园买12包毛巾，每包装5条，每条售价3元，一共需要多少元？
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">12 * 15</gadget>
<output>180</output>

<result>180</result>