A paper mill used 150 tons of water in the first half of the year. After improving the production process, it saved an average of 8 tons of water per month in the second half of the year. How many tons of water are shared throughout the year?
某造纸厂上半年用水150吨，改进生产工艺后，下半年平均每月节约用水8吨．全年共用水多少吨？
<gadget id="calculator">150 * 2</gadget>
<output>300</output>

<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<gadget id="calculator">300 - 48</gadget>
<output>252</output>

<result>252</result>