Xiaoming's family shared 240 kWh of electricity for two months, and the electricity bill was 52 yuan in the first month, and 1.4 times the electricity bill in the second month. How much is the average electricity per kilowatt-hour?
小明家两个月共用电240千瓦时，第一个月付电费52元，第二个月付的电费是第一个月的1.4倍．平均每千瓦时电多少元？
<gadget id="calculator">52 * 1.4</gadget>
<output>72.8</output>

<gadget id="calculator">72.8 + 52</gadget>
<output>124.8</output>

<gadget id="calculator">124.8 / 240</gadget>
<output>0.52</output>

<result>0.52</result>