The fixed-line monthly rental fee is 25 yuan, and the call fee is 0.12 yuan per minute. The call time of Xiaopang's family last month was a minute, how much is the phone bill paid by Xiaopang's family last month.
固定电话每月月租费25元，每分钟通话费0.12元．小胖家上月通话时间为a分钟，小胖家上个月应付电话费多少元．
<gadget id="calculator">25 + 0.12</gadget>
<output>25.12</output>

<result>25.12</result>