Last year, the electricity consumption was 2.5 million kwh, and this year it saved 35% of the electricity compared with last year. How many tens of thousands of kwh will be used this year?
去年用电250万千瓦时，今年比去年节电三成五，今年用电多少万千瓦时．
<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">1 - (7/20)</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">250 * (13/20)</gadget>
<output>325/2 = around 162.5</output>

<result>325/2 = around 162.5</result>