Xiao Qiang's father went out to work. In order to save money, he shared a house with two fellow workers. The water consumption last month was 9.9 tons, and the price per ton of water was 2.10 yuan. How much is the average water fee per person?
肖强的爸爸出外打工，为了省钱，他和两位工友合租一套住房．上个月的用水量是9.9吨，每吨水的价格是2.10元，平均每人应付水费多少元？
<gadget id="calculator">9.9 / 3</gadget>
<output>3.3</output>

<gadget id="calculator">2.1 * 3.3</gadget>
<output>6.93</output>

<result>6.93</result>