Li Mingjia used 25 kWh less electricity in May than in April, and saved (1/7) in May compared to April. How many kWh did they use in May?
李明家五月份比四月份少用电25千瓦时，五月份比四月份节约了(1/7)，五月份用电多少千瓦时？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">25 / (1/7)</gadget>
<output>175</output>

<gadget id="calculator">175 - 25</gadget>
<output>150</output>

<result>150</result>