How to find any number A with a large number of digits, if it is known that the remainder of dividing this number by B will be equal to C?

Question

Mathematics

In general, the essence of the problem is the question, is there an easy way to find such a number (or several), given that the number of characters should be more than 1000?

Answer 1

Add the number C to the number B until you reach the required number of characters in A.

Answer 2

Yes:
print the number B, then 1000 zeros, then C. Of course, you need to have C < B.