In the multiplication given below, all the digits, except one, were consistently replaced by another digit:

    617 
*   702 
_______
   1639 
  3733 
 2807  
__________  
 265699

Find the substitution code and restore the original multiplication.

(In reply to No Subject by Ady TZIDON)

Ady, while your explanation makes sense if we forget the partial products, I think Jer's point is that the partial products are part of the problem, and given the partial products there is only one valid solution.  The fact that one of the digits was invariant in the coded version is thus superfluous, that info is not required to solve the puzzle. 

Not a big deal though, it was a good puzzle. 

Posted by tomarken on 2014-03-12 10:06:51