Two engineering teams, A and B, jointly repair a road, and it takes 8 days to complete it. Now, team A will repair it in 6 days first, and the rest will be completed by A and B in 4 days. How many days will it take for A to repair this road alone?
甲乙两个工程队合修一条公路，8天完成，现在由甲队先修6天，剩下的由甲、乙合修4天，才能完成．若让甲单独修这条公路需用几天？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/8) * 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) / 6</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / (1/12)</gadget>
<output>12</output>

<result>12</result>