The electricity consumption of the school in May is 4200 kWh, which is 1/6 less than that in April. How much is the electricity consumption in April?
学校五月份用电4200千瓦时，比四月份节约(1/6)，四月份用电多少千瓦时．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">4_200 / (5/6)</gadget>
<output>5_040</output>

<result>5_040</result>