An ordinary incandescent lamp consumes about 71.2 kWh of electricity a year. If it is replaced with an energy-saving lamp with the same brightness, it can save 55.2 kWh of electricity a year. How many times more electricity do incandescent lamps consume than energy-saving lamps?
一只普通的白炽灯一年耗电约71.2千瓦时，如果换成亮度相同的节能灯，一年可以省电55.2千瓦时．白炽灯的耗电量是节能灯的多少倍？
<gadget id="calculator">71.2 - 55.2</gadget>
<output>16</output>

<gadget id="calculator">71.2 / 16</gadget>
<output>4.45</output>

<result>4.45</result>