The school carried out water-saving activities, saving a total of 256 tons of water in the first two months. According to this calculation, how many tons of water can the school save a year?
学校开展节水活动，前2个月共节约用水256吨．照这样计算，学校一年能节约用水多少吨？
<gadget id="calculator">256 / 2</gadget>
<output>128</output>

<gadget id="calculator">128 * 12</gadget>
<output>1_536</output>

<result>1_536</result>