Kunming City collects water fees according to the following standards: the water used does not exceed 20 tons, and the fee is 1.2 yuan per ton. More than 20 tons, the excess part will be charged at 1.5 yuan per ton. Xiaohejia's water fee in April is an average of 1.25 yuan per ton, so how much water fee should Xiaohejia pay in April?
昆明市按以下标准收取水费：用水不超过20吨，按每吨1.2元收费．超过20吨，则超过部分按每吨1.5元收费．小和家四月份的水费是平均每吨1.25元，那么小和家四月份应交水费多少元？
<gadget id="calculator">1.2 * 20</gadget>
<output>24</output>

<gadget id="calculator">1.5 * 4</gadget>
<output>6</output>

<gadget id="calculator">24 + 6</gadget>
<output>30</output>

<result>30</result>