NumberWizFP: difficult Octal sum

Here's a rather difficult Octal example:
How do you add, subtract, multiply and divide 1, 1, 2, 3, 4, 6 to get 322 octal?


If you know a solution, please write it in the comments. At any rate I'll be back with one tomorrow.


Why not buy NumberWiz for Diehard Programmers? Just $1.99.