The average weight of 6 boys is 40 kg, and the average weight of 4 girls is 30 kg. What is the average weight of these 10 students in kg?
6个男生的平均体重是40千克，4个女生的平均体重是30千克，这10个同学的平均体重是多少千克．
<gadget id="calculator">40 * 6</gadget>
<output>240</output>

<gadget id="calculator">30 * 4</gadget>
<output>120</output>

<gadget id="calculator">240 + 120</gadget>
<output>360</output>

<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">360 / 10</gadget>
<output>36</output>

<result>36</result>