It takes 16 days for team A to repair a section of road alone, and 10 days for team B to repair it alone. After 3 days of joint repairs from both ends, there is still 12.3 kilometers left. How many kilometers is the length of this section of road?
一段公路，甲队单独修需16天，乙队单独修需10天，两队从两头同时开工合修3天后还剩12.3千米，这段公路长为多少千米？
<gadget id="calculator">1 / 16</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/16) + (1/10)</gadget>
<output>13/80 = around 0.1625</output>

<gadget id="calculator">(13/80) * 3</gadget>
<output>39/80 = around 0.4875</output>

<gadget id="calculator">1 - (39/80)</gadget>
<output>41/80 = around 0.5125</output>

<gadget id="calculator">12.3 / (41/80)</gadget>
<output>24</output>

<result>24</result>