Xiaohua’s family used 5 degrees of electricity in September, which was 2/7 less than in August. How much electricity did Xiaohua’s family use in August?
小华家九月份用电5度，比八月份节约了(2/7)，小华家八月份用电多少度？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">5 / (5/7)</gadget>
<output>7</output>

<result>7</result>