certain province implements tiered electricity prices, and the annual electricity consumption adopts the method of charging electricity in three levels on a monthly basis. The first gear: 170 kWh and below, charged at 0.525 yuan per kWh; the second gear: 171 to 260 kWh, charged at 0.575 yuan per kWh; The fee is 0.825 yuan per kWh. The electricity consumption of Zhao Yuanjia in September is 280 kwh, how much is the electricity bill?
某省实行阶梯电价，全年用电采取按月分三档计费的方法收取电费．第一档：170千瓦时及以内，按每千瓦时0.525元收费；第二档：171～260千瓦时，按每千瓦时0.575元收费；第三档：261千瓦时及以上的电量，按每千瓦时0.825元收费．赵元家9月份的用电量为280千瓦时，应付电费多少元？
<gadget id="calculator">0.525 * 170</gadget>
<output>89.25</output>

<gadget id="calculator">260 - 170</gadget>
<output>90</output>

<gadget id="calculator">0.575 * 90</gadget>
<output>51.75</output>

<gadget id="calculator">280 - 260</gadget>
<output>20</output>

<gadget id="calculator">0.825 * 20</gadget>
<output>16.5</output>

<gadget id="calculator">89.25 + 51.75 + 16.5</gadget>
<output>157.5</output>

<result>157.5</result>