Two groups, A and B, do hand-made, 4 people in group A make 80 pieces in total, and 6 people in group B make 90 pieces in total. How many pieces of handmade work do each person of Group A and Group B make on average?
甲、乙两个小组做手工制作，甲组4人共做80件，乙组6人共做90件．甲、乙两组平均每人做多少件手工制作？
<gadget id="calculator">80 + 90</gadget>
<output>170</output>

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

<gadget id="calculator">170 / 10</gadget>
<output>17</output>

<result>17</result>