In our group, 1 person weighs 30 kg, 2 people weigh 32 kg, and 4 people weigh 29 kg. What is the average weight of our group?
我们组有1人重30千克，有2人重32千克，有4人重29千克，我们组平均体重是多少千克？
<gadget id="calculator">32 * 2</gadget>
<output>64</output>

<gadget id="calculator">29 * 4</gadget>
<output>116</output>

<gadget id="calculator">30 + 64 + 116</gadget>
<output>210</output>

<gadget id="calculator">1 + 2 + 4</gadget>
<output>7</output>

<gadget id="calculator">210 / 7</gadget>
<output>30</output>

<result>30</result>