The starting fare of a taxi in Bazhong is 3 yuan, and after 2.5km, it will be charged at 1.4 yuan per kilometer. The place where Uncle Li is going is 30 kilometers away from the place where he took a taxi. How much taxi fare should Uncle Li prepare at least?
巴中出租车的起步价是3元，2.5km以后按每千米1.4元计费．李叔叔要去的地方离他打车的地方有30km，李叔叔至少要准备多少钱的打车费？
<gadget id="calculator">30 - 2.5</gadget>
<output>27.5</output>

<gadget id="calculator">27.5 * 1.4</gadget>
<output>38.5</output>

<gadget id="calculator">38.5 + 3</gadget>
<output>41.5</output>

<result>41.5</result>