Handan City carried out the activity of "advocating saving and avoiding waste". A certain restaurant used 240 tons of water in March last year, which was 20% less than in April. Could you please help the restaurant to find out how many tons of water it used in April?
邯郸市开展"提倡节约，避免浪费"的活动，某饭店去年三月份用水240吨，比四月份节约20%，请你帮该饭店求一下四月份用水多少吨？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">240 / (4/5)</gadget>
<output>300</output>

<result>300</result>