Wang Qiang's electricity bill in August is 120 yuan, which is 20% less than that in July. How much is the electricity bill in July?
王强家八月份电费为120元，比七月份节约20%，七月份电费是多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">120 / (4/5)</gadget>
<output>150</output>

<result>150</result>