156496

I started by thinking what goes into 32? 8 and 4. 40? You could chose 4 and 10 or 5 and 8, but I went for 5 and 8. Do the same for 49 and 22 until you have quite allot of the edges filled in. Now, add more numbers to the center according to the edge. 11x5 is 55, and 7x4 is 28. keep on filling in the edges until they are full, then complete the grid! The edges across go: 4, 5, 2, 5, 7,9. On the side going downwards there is: 8, 7, 11, 3, 12, 6. Your problem is solved!