There are 48 trees in a certain class, and the tree species are collected for 3 hours. Among them, 7 people in the first group collect a total of 73.5 kilograms. According to this calculation, how many kilograms of trees can be collected by the whole class.
某班共有48个，采集树种3小时，其中第一个小组7人共采集73.5千克，照这样计算，全班可采集树多少千克．
<gadget id="calculator">73.5 / 7</gadget>
<output>10.5</output>

<gadget id="calculator">10.5 * 48</gadget>
<output>504</output>

<result>504</result>