To build a road, 5 kilometers a day, 8 days to repair (1/4) of the full length, after that, build an extra (5/2) kilometers every day, just to complete the project on schedule. How many days did it take to build this road?
修一条路，每天修5千米，8天正好修全长的(1/4)，以后每天多修(5/2)千米，正好按期完工．修完这条路用了多少天？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">8 / (1/4)</gadget>
<output>32</output>

<gadget id="calculator">5 * 32</gadget>
<output>160</output>

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<gadget id="calculator">160 - 40</gadget>
<output>120</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">5 + (5/2)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">120 / (15/2)</gadget>
<output>16</output>

<gadget id="calculator">16 + 8</gadget>
<output>24</output>

<result>24</result>