Xiaohua's family used 9 tons of water in April and paid a total water fee of 33.3 yuan. How much is it per ton of water.
小华家四月份用水9吨，共缴水费33.3元．每吨水要多少元．
<gadget id="calculator">33.3 / 9</gadget>
<output>3.7</output>

<result>3.7</result>