The canteen originally used (12/25) tons of coal per day, but due to the use of new technology to improve the stove, the daily coal consumption is reduced (1/6) compared to the original. How many tons of coal was used in June?
食堂原来每天用煤(12/25)吨，由于采用新技术改进了炉灶，每天的用煤量比原来减少(1/6)．六月份用煤多少吨？
<gadget id="calculator">12 / 25</gadget>
<output>12/25 = around 0.48</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(12/25) * (5/6) * 30</gadget>
<output>12</output>

<result>12</result>