Xiaoming's family used about 10 tons of water per month on average this year. If the unit price of tap water is 2.5 yuan per ton, how much will Xiao Ming's family have to pay for water this year?
小明家今年平均每月用水约10吨．如果每吨自来水单价2.5元，小明家今年要交水费多少元？
<gadget id="calculator">10 * 2.5 * 12</gadget>
<output>300</output>

<result>300</result>