It takes 24 days to repair a highway alone, and 36 days to complete the repair by B alone. Now Team A works alone for 4 days, and then the two teams jointly repair it. The two teams need to work together for a few more days. Can the entire road be repaired?
修一条公路，甲单独修需24天完成，乙单独修需36天完成，现在有甲队单独修4天，再由两队合修，两队又需合修几天，全部公路得以修好？
<gadget id="calculator">1 / 24</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">(1/24) * 4</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 / 36</gadget>
<output>1/36 = around 0.027778</output>

<gadget id="calculator">(1/24) + (1/36)</gadget>
<output>5/72 = around 0.069444</output>

<gadget id="calculator">(5/6) / (5/72)</gadget>
<output>12</output>

<result>12</result>