The Electric Power Bureau erected a power line leading to the mountain. 4.15 meters were erected every day, and after 6 days of work, there were still 7.1 kilometers left to be erected. How long is this line in kilometers?
电业局架设一条通往山区的电线．每天架设4.15米，工作了6天，还剩7.1千米没架设．这条线路全长多少千米？
<gadget id="calculator">4.15 * 6</gadget>
<output>24.9</output>

<gadget id="calculator">24.9 + 7.1</gadget>
<output>32</output>

<result>32</result>