The experimental elementary school used 600 kwh of electricity last month, and this month saved (1/10) compared with the previous month. How much is the electricity consumption this month?
实验小学上个月用电600度，这个月比上个月节约(1/10)，这个月用电多少度．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">600 * (9/10)</gadget>
<output>540</output>

<result>540</result>