school saved 150 tons of water in the first half of the year, and an average of 33 tons of water per month in the second half of the year. How many tons of water was saved per month on average throughout the year?
某学校上半年共节约用水150吨，下半年平均每月节约用水33吨，全年平均每月节约用水多少吨？
<gadget id="calculator">33 * 6</gadget>
<output>198</output>

<gadget id="calculator">150 + 198</gadget>
<output>348</output>

<gadget id="calculator">348 / 12</gadget>
<output>29</output>

<result>29</result>