A steel plant used 480 kWh of electricity in March, saving 25% compared with February. How many kilowatt-hours are saved?
某钢铁厂三月份用电480千瓦时，比二月份节约了25%．节约了多少千瓦时？
<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">480 / (3/4)</gadget>
<output>640</output>

<gadget id="calculator">640 * (1/4)</gadget>
<output>160</output>

<result>160</result>