A mirror is 12 decimeters long and 5 decimeters wide. The price of this kind of mirror is 2 yuan per square decimeter. How much does it cost to buy this mirror?
一面镜子长12分米，宽5分米，这种镜子的价格是每平方分米2元，买这面镜子需要多少元？
<gadget id="calculator">12 * 5 * 2</gadget>
<output>120</output>

<result>120</result>