The number of girls in a class is twice that of boys, the average weight of girls is 22 kg, and the average weight of boys is 28 kg. Find the average weight of boys and girls.
某班女生人数是男生的2倍，女生的平均体重是22千克，男生的平均体重是28千克．求男、女生的平均体重．
<gadget id="calculator">2 * 22</gadget>
<output>44</output>

<gadget id="calculator">44 + 28</gadget>
<output>72</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">72 / 3</gadget>
<output>24</output>

<result>24</result>