The weight of a rhino is 2.5 tons, and the weight of a whale is 19.8 times that of the rhino. How many tons does this whale weigh?
一头犀牛的体重是2.5吨，一头鲸的体重是这头犀牛的19.8倍．这头鲸的体重是多少吨？
<gadget id="calculator">2.5 * 19.8</gadget>
<output>49.5</output>

<result>49.5</result>