There are three people in Xiaoming's family. Last month, they used 12.6 tons of water. The price of each ton of water is 1.60 yuan. How much is the average water bill per person?
小明家共三口人，上月用水12.6吨，每吨水的价钱是1.60元，平均每人交水费多少元？
<gadget id="calculator">12.6 / 3</gadget>
<output>4.2</output>

<gadget id="calculator">1.6 * 4.2</gadget>
<output>6.72</output>

<result>6.72</result>