A software engineer can use several computers of a certain type to complete a software design within 3 days. However, if 3 more computers of the same type are added, the software design task can be completed within 2 days. Assuming that the computing speeds of the computers are the same, how many days can this design task be completed with only one computer.
软件工程师运用某种型号的计算机若干台，可以在3天内完成一项软件设计．然而若增加同种型号的计算机3台，则2天内可完成这项软件设计任务．设计算机的运算速度相同，那么只用一台计算机多少天可以完成这项设计任务．
<gadget id="calculator">1 / 3 / 2</gadget>
<output>1/6 = around 0.166667</output>

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

<result>6</result>