A processing plant, after energy-saving rectification, saved 240 tons of water in the first half of last year, and saved an average of 60 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?
一个加工厂，节能整改后，去年上半年节约用水240吨，下半年平均每月节约用水60吨，全年平均每月节约用水多少吨？
<gadget id="calculator">60 * 6</gadget>
<output>360</output>

<gadget id="calculator">360 + 240</gadget>
<output>600</output>

<gadget id="calculator">600 / 12</gadget>
<output>50</output>

<result>50</result>