I hope the school will use 24 tons of water in October, and save 20% in September compared to October. How much water will the school use in these two months?
希望学校十月份的用水是24吨，九月份比十月节省20%，学校这两个月用水是多少？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">24 * (4/5)</gadget>
<output>96/5 = around 19.2</output>

<gadget id="calculator">(96/5) + 24</gadget>
<output>216/5 = around 43.2</output>

<result>216/5 = around 43.2</result>