The school’s electricity bill in September is 540 yuan, which is 1/7 less than that in August. How much is the electricity bill in August?
学校九月份电费是540元，比八月份节约了(1/7)，八月份电费是多少元？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 - (1/7)</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">540 / (6/7)</gadget>
<output>630</output>

<result>630</result>