|The CDS (contiguous digit sum) of any
integer is the sum of all the smaller integers that can be formed from
it, using only contiguous digits.
Example: CDS(8358) = 1393, the sum of 8,83,835,3,35,358,5,58,8.
It just so happens that 8358 is thus a multiple of its own CDS. 8358/1893 = 6 exactly.
Find all other 4-digit integers which are an exact multiple of their own CDS.