Pipazhou Primary School used 2.5 million hours of electricity in February, and saved 20% of the electricity consumption in March compared to February. How many kilowatt-hours of electricity was used in March?
琵琶州小学二月份用电250千万时，三月份比二月份节约用电二成，三月份用电多少千瓦时．
<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">250 * (4/5)</gadget>
<output>200</output>

<result>200</result>