The school carried out water saving activities, saving a total of 345 tons of water in the first three 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3个月共节约用水345吨．照这样计算，学校一年能节约用水多少吨？
<gadget id="calculator">345 / 3</gadget>
<output>115</output>

<gadget id="calculator">115 * 12</gadget>
<output>1_380</output>

<result>1_380</result>