Wanguang Power Plant used 3,200 tons of coal in May, which was 1/9 less than in April, and 15% more in June than in May. How many tons more coal was used in June than in April?
万光发电厂五月份用煤3200吨，比四月份节约了(1/9)，六月份比五月份增加了15%．六月份比四月份多用煤多少吨？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">3_200 * (23/20)</gadget>
<output>3_680</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">1 - (1/9)</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">3_200 / (8/9)</gadget>
<output>3_600</output>

<gadget id="calculator">3_680 - 3_600</gadget>
<output>80</output>

<result>80</result>