Solve for u







Do long division using only integers:

         3 
3t-1)10t+0
      9t-3
       t+3



So we can tell from that that

u must be larger than 3.  So try u = 4











So 24 is a solution

The product of its digits is 8, and 24 is 3 times 8.

Try u=5









 

So 15 is another solution

The product of its digits is 5, and 15 is 3 times 5.

Those are the only two solutions.

Edwin