The population of Zhao, Qian, and Sun is 3, 5, and 2 in sequence. They share a water meter, and they agree to charge by person, and the billing unit is 10 days. If it is less than 10 days, it will be rounded up. A guest came to the Zhao family and stayed for 14 days; one member of the Sun family went on a business trip for 22 days, and the three households paid a total of 58 yuan for water in that month, so how much water should the Sun family pay?
赵、钱、孙三户人家的人口顺次为3、5、2，它们合用一只水表，商定以人计费，且以10天为计费单位，不足10天的按四舍五入处理，某月赵家来了一位客人，住了14天；孙家有一人出差22天，该月三户一共支付水费58元，则孙家应付水费多少元．
<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<gadget id="calculator">2 + 2</gadget>
<output>4</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">4 + 6 + 15 + 4</gadget>
<output>29</output>

<gadget id="calculator">4 / 29</gadget>
<output>4/29 = around 0.137931</output>

<gadget id="calculator">58 * (4/29)</gadget>
<output>8</output>

<result>8</result>