A factory shared 2160 tons of water in March and April, and the water consumption in April was 25% more than that in March, and the water consumption in April was 80% of that in May. How many tons of water is used in May?
某工厂三、四月份共用水2160吨，四月份的用水量比三月份多25%，四月份用水量是五月份的80%．五月份用水对少吨？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + 1 + (1/4)</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">2_160 / (9/4)</gadget>
<output>960</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(5/4) / (4/5)</gadget>
<output>25/16 = around 1.5625</output>

<gadget id="calculator">960 * (25/16)</gadget>
<output>1_500</output>

<result>1_500</result>