Concatenation is the joining of two numbers by their numerals. That is, the concatenation of 444 and 777 is 444777.
Concatenation of numbers A and B is denoted A || B.
A and B are three-digit integers. So A || B is a 6-digit number.
So, what is the smallest integer of the form (A || B) / B ?
Note the trivial solution is :
A = 001, B = 500, then A || B = 001500 and (A || B)/B = 001500/500 = 3