The charging standard of a city’s inner-city calls: the first 3 minutes (less than 3 minutes will be counted as 3 minutes) is 0.2 yuan in total, and 0.1 yuan is added for each subsequent minute. How many minutes on the phone?
某市市内电话的收费标准：前3分钟(不满3分钟也按3分钟计算)共0.2元，以后每打1分钟加0.1元，小明有一天连续打一个电话，共计话费2.6元，小明打了多少分钟的电话？
<gadget id="calculator">2.6 - 0.2</gadget>
<output>2.4</output>

<gadget id="calculator">2.4 / 0.1</gadget>
<output>24</output>

<gadget id="calculator">24 + 3</gadget>
<output>27</output>

<result>27</result>