def repeatedString(s, n):
    fullCount = n // len(s)
    leftCount = n % len(s)
    aCount = sum(1 if char == "a" else 0 for char in s)
    
    res = aCount * fullCount
    
    for i in range(leftCount):
        if s[i] == "a":
            res += 1
        
    return res