Li Ping rode a bicycle from home to the county seat. It was originally planned to take 5:30 minutes. Due to the 3.6 kilometers of uneven roads in the middle, the speed was equivalent to three-quarters of the original speed when walking this section of the road. Therefore, the journey from home to the county seat was slower than planned 12 minutes late, how many kilometers is Li Ping's house from the county?
李萍骑自行车从家到县城，原计划用5时30分，由于中途有3.6千米的道路不平，走这段路时，速度相当于原来的四分之三，因此从家到县城比计划晚了12分，李平家离县城有多少千米？
<gadget id="calculator">3.6 / 0.6</gadget>
<output>6</output>

<gadget id="calculator">5.5 * 6</gadget>
<output>33</output>

<result>33</result>