The calculation method of the water fee of a water supply company is as follows: if each household uses less than 5 cubic meters of water per month, it will charge 1.5 yuan per cubic meter; if each household uses more than 5 cubic meters of water per month, it will charge a higher fee per cubic meter for the excess Quota fee, in January, Zhang’s household’s water consumption is 2/3 of Li’s household’s water consumption, Zhang’s household’s monthly water fee is 17.5 yuan, and Li’s household’s monthly water fee is 27.5 yuan. What is the charge per cubic meter for the excess of 5 cubic meters? Yuan?
某自来水公司水费计算办法如下：若每户每月用水不超过5立方米，则每立方米收费1.5元，若每户每月用水超过5立方米，则超出部分每立方米收取较高的定额费用，1月份，张家用水量是李家用水量的(2/3)，张家当月水费是17.5元，李家当月水费27.5元，超出5立方米的部分每立方米收费多少元？
<gadget id="calculator">5 * 1.5</gadget>
<output>7.5</output>

<gadget id="calculator">17.5 - 7.5</gadget>
<output>10</output>

<gadget id="calculator">27.5 - 7.5</gadget>
<output>20</output>

<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<gadget id="calculator">100 - 50</gadget>
<output>50</output>

<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<gadget id="calculator">40 - 30</gadget>
<output>10</output>

<gadget id="calculator">50 / 10</gadget>
<output>5</output>

<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<gadget id="calculator">10 - 5</gadget>
<output>5</output>

<gadget id="calculator">10 / 5</gadget>
<output>2</output>

<result>2</result>