The ratio of coal consumption in the canteen of Donghutang Elementary School is 7:8 in May and June, and 3/4 tons of coal are used in two months. How many tons of coal are used in June?
东湖塘小学食堂五、六月用煤量的比是7：8，两个月一共用煤(3/4)吨，六月用煤多少吨？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">8 + 7</gadget>
<output>15</output>

<gadget id="calculator">8 / 15</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">(3/4) * (8/15)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>