Encore went to the fruit stand to buy watermelons, and the old woman's watermelons sold for 0.45 yuan per kilogram. Encore picked a big watermelon weighing 10.7 kilograms. How much should Encore pay?
安可去水果摊买西瓜，老婆婆的西瓜每千克卖0.45元．安可挑了一个大西瓜，重10.7千克，安可要应该付多少钱呢？
<gadget id="calculator">0.45 * 10.7</gadget>
<output>4.815</output>

<result>4.815</result>