def repeatedString(s, n):
    # Count 'a's in one full instance of string 's'
    countInOneInstance = s.count('a')

    # Calculate how many full instances of 's' can fit in 'n'
    countInFullInstance = countInOneInstance * (n // len(s))

    # Count 'a's in the remaining part of the string (if any)
    countInPartInstance = 0
    numFirstCharsToCount = n % len(s)

    for i in range(numFirstCharsToCount):
        if s[i] == 'a':
            countInPartInstance += 1

    return countInFullInstance + countInPartInstance