From the book assembly languages for x86 Processors (7th edition) under chapter 5 "procedures". I am stuck on this assembling coding exercise and confuse what it's asking me.

11. Finding Multiples of K In a byte array of size N, write a procedure that finds all multiples of K that are less than N. Initialize the array to all zeros at the beginning of the program, and then whenever a multiple is found, set the corresponding array element to 1. Your procedure must save and restore any registers it modifies. Call your procedure twice, with K = 2, and again with K = 3. Let N equal to 50. Run your program in the debugger and verify that the array values were set correctly. Note: This procedure can be a useful tool when finding prime integers. An efficient algorithm for finding prime numbers is known as the Sieve of Eratosthenes. You will be able to implement this algorithm when conditional statements are covered in Chapter 6.