Melon is 3.2 yuan per kilogram. Grandma likes to eat melons. Dongdong bought 5 kilograms for grandma. How much does it cost?
甜瓜每千克3.2元，奶奶爱吃甜瓜，冬冬为奶奶买了5千克，需要多少钱？
<gadget id="calculator">3.2 * 5</gadget>
<output>16</output>

<result>16</result>