In order to encourage saving electricity, a power supply company in a certain city stipulates the following calculation method for electricity charges: monthly electricity consumption should not exceed 100 kWh (including 100 kWh). The charge is 0.5 yuan per kWh; the monthly electricity consumption exceeds 100 kwh, and the excess part is charged at 0.6 yuan per kwh. Xiaoming's family paid 60.2 yuan for electricity in February, how many kilowatt-hours will be used for electricity?
为了鼓励节约用电，某市供电公司规定了以下电费计算方法：每月用电不超过100千瓦时(含100千瓦时)．每千瓦时按0.5元收费；每月用电超过100千瓦时，超过部分按每千瓦时0.6元收费．小明家2月份付电费60.2元，用电多用多少千瓦时？
<gadget id="calculator">100 * 0.5</gadget>
<output>50</output>

<gadget id="calculator">60.2 - 50</gadget>
<output>10.2</output>

<gadget id="calculator">10.2 / 0.6</gadget>
<output>17</output>

<gadget id="calculator">17 + 100</gadget>
<output>117</output>

<result>117</result>