The school carried out water conservation activities, saving a total of 504 tons of water in the first 4 months. According to this calculation, how many tons of water can the school save a year?
学校开展节约用水活动，前4个月共节约用水504吨．照这样计算，学校一年能节约用水多少吨？
<gadget id="calculator">504 / 4</gadget>
<output>126</output>

<gadget id="calculator">126 * 12</gadget>
<output>1_512</output>

<result>1_512</result>