Eggs are 4.2 yuan per kilogram, how much should my mother pay for buying 3.6 kilograms.
鸡蛋每千克4.2元，妈妈买了3.6千克应付多少元．
<gadget id="calculator">3.6 * 4.2</gadget>
<output>15.12</output>

<result>15.12</result>