The sixth-grade manual group made learning tools. 22 female students made a total of 290 pieces, and 24 male students made 9 pieces on average. How many pieces did each person make on average in the manual group?
六年级手工组做学具，女同学22人共做290件，男同学24人，平均每人做9件，手工组平均每人做多少件？
<gadget id="calculator">24 * 9</gadget>
<output>216</output>

<gadget id="calculator">290 + 216</gadget>
<output>506</output>

<gadget id="calculator">24 + 22</gadget>
<output>46</output>

<gadget id="calculator">506 / 46</gadget>
<output>11</output>

<result>11</result>