The school uses 150 degrees of electricity in the first 4 days of a week, and an average of 41 degrees of electricity per day in the last 3 days. How much electricity does the school use per day on average this week?
学校在一个星期的前4天共用电150度，后3天平均每天用电41度．学校这个星期平均每天用电多少度？
<gadget id="calculator">41 * 3</gadget>
<output>123</output>

<gadget id="calculator">150 + 123</gadget>
<output>273</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">273 / 7</gadget>
<output>39</output>

<result>39</result>