Li Ming’s family used 12 tons of water in September, and they paid a total water fee of c yuan, so how much is the water fee per ton?
李明家九月份的用水量是12吨，共交水费c元，那么水费每吨是多少元．
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<result>1/12 = around 0.083333</result>