A and B work together to process a batch of parts, which can be completed in 5 days. In the middle, A stopped work for 2 days due to an accident, so the two took 6 days to complete it. If A processes this batch of parts alone, how many days will it take to complete?
甲乙两人一起加工一批零件，5天可以完成．中途甲因事停工2天，因此两人共用了6天才完成．如果甲单独加工这批零件，需要多少天才可以完成？
<gadget id="calculator">6 - 2</gadget>
<output>4</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">4 * (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 2</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/5) - (1/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / (1/10)</gadget>
<output>10</output>

<result>10</result>