There are two coal mining teams in a coal mine. The first group has 10 people, and each person mines 6 tons of coal per day; the second team has 15 people, and each person mines 7 tons of coal per day.
某煤矿两个采煤小组，第一组有10人，每人每天采煤6吨；第二小组有15人，每人每天采煤7吨，两组平均每人每天采煤多少吨？
<gadget id="calculator">6 * 10</gadget>
<output>60</output>

<gadget id="calculator">7 * 15</gadget>
<output>105</output>

<gadget id="calculator">60 + 105</gadget>
<output>165</output>

<gadget id="calculator">10 + 15</gadget>
<output>25</output>

<gadget id="calculator">165 / 25</gadget>
<output>33/5 = around 6.6</output>

<result>33/5 = around 6.6</result>