A certain factory used 3.5 million kwh of electricity last year, and this year it has saved 25% of the electricity compared with last year. How many kwh of electricity will it use this year?
某工厂去年用电350万千瓦时，今年比去年节电二成五，今年用电多少万千瓦时？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">350 * (3/4)</gadget>
<output>525/2 = around 262.5</output>

<result>525/2 = around 262.5</result>