Lantian Primary School used 480 tons of water in September, 20% more than in October. How many tons of water did the school share in the past two months?
蓝天小学9月份用水480吨，比10月份多用水20%．该校这两个月共用水多少吨？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">480 / (6/5)</gadget>
<output>400</output>

<gadget id="calculator">400 + 480</gadget>
<output>880</output>

<result>880</result>