A certain factory consumes 2.625 million kwh of electricity this year, saving 25% of electricity this year compared to last year. How many tens of thousands of kwh did it use last year?
某工厂今年用电262.5万千瓦时，今年比去年节电二成五，去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">262.5 / (3/4)</gadget>
<output>350</output>

<result>350</result>