The water consumption of Xiaoqiang's family in the first half of the year was 43.2 tons, and the price per ton of water was 2.5 yuan. How much does Xiaoqiang's family pay for water on average every month?
小强家上半年的用水量是43.2吨，每吨水的价格是2.5元．小强家平均每月付水费多少元？
<gadget id="calculator">43.2 / 6</gadget>
<output>7.2</output>

<gadget id="calculator">7.2 * 2.5</gadget>
<output>18</output>

<result>18</result>