The community carried out water conservation activities, saving a total of 580 tons of water in the first 4 months. According to this calculation, how many tons of water can this community save a year?
社区开展节约用水活动，前4个月共节约用水580吨．照这样计算，这个社区一年能节约用水多少吨？
<gadget id="calculator">580 / 4</gadget>
<output>145</output>

<gadget id="calculator">145 * 12</gadget>
<output>1_740</output>

<result>1_740</result>