194855

a=4
b=2
c=8
d=5
e=7

I worked out that for the units in the answer to be 1, the units in the top row must be 7 (3x7=21). Now that I knew that e=7, I could work out that the tens column in the top row must be 5 (3x5=15 plus the 2 that I carried from 21 = 17). The same logic for the other columns helped me work out the other numbers (3x8= 24 + 1 = 25), (3x2=6), (3x4=12), (3x1 + 1 = 4).