Mingzhu Power Plant used 240,000 tons of coal in July, which was 1/7 less than in June. How many tons of coal was used in June?
明珠发电厂七月份用煤24万吨，比六月份节约了(1/7)，六月份用煤多少万吨？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 - (1/7)</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">24 / (6/7)</gadget>
<output>28</output>

<result>28</result>