In order to encourage residents to save water, the water company stipulates that each household will be charged 1.8 yuan per ton for water within 12 tons (including 12 tons) per month, and if it exceeds 12 tons, the excess tonnage will be charged at 5 yuan per ton. The monthly water consumption is 14 tons, how much should I pay for water?
为鼓励居民节约用水，自来水公司规定：每户每月用水12吨以内(含12吨)按每吨1.8元收费，超过12吨的，其超出吨数按每吨5元收费，文文家上月用水14吨，应交水费多少元？
<gadget id="calculator">12 * 1.8</gadget>
<output>21.6</output>

<gadget id="calculator">14 - 12</gadget>
<output>2</output>

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

<gadget id="calculator">21.6 + 10</gadget>
<output>31.6</output>

<result>31.6</result>