For a manuscript, it takes 12 hours for Xiao Ming to type it alone, and 8 hours for Xiao Hong to type it alone. Now the two of them have typed it together for 4 hours, and there are still 5,000 words left. How many words are there in this manuscript?
一份稿件，小明单独打完需要12小时，小红单独打完需要8小时，现在他们两人合打了4小时，结果还剩下5000个字，这份稿件一共有多少个字？
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/12) + (1/8)</gadget>
<output>5/24 = around 0.208333</output>

<gadget id="calculator">(5/24) * 4</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">5_000 / (1/6)</gadget>
<output>30_000</output>

<result>30_000</result>