My family paid a total of 22.50 yuan for water last month, and the water price per ton is 1.50 yuan. How many tons of water was shared last month?
我家上个月共缴水费22.50元，每吨水价为1.50元，上个月共用水多少吨．
<gadget id="calculator">22.5 / 1.5</gadget>
<output>15</output>

<result>15</result>