NumberWizFP: Solution for the difficult octal sum

The question was: how do you add, subtract, multiply and divide 1, 1, 2, 3, 4, 6 to get 322 octal?


A solution:

322 = (4 + 1) x 3 x (6 + 1) x 2 = 

5 x 3 x 7 x 2 = 17 x 7 x 2 = (10 + 7) x 7 x 2 = (70 + 61) x 2 = 151 x 2

NumberWiz for Diehard Programmers generated this sum and gave the answer in under one second. Why not buy it?