def repeatedString(s, n):
    a=0
    for i in s:
        if i=="a":
            a+=1
    if n%len(s)==0:
        b=a*(n//len(s))
    else:
        b=a*(n//len(s))
        for i in range(n%len(s)):
            if s[i]=="a":
                b+=1
    return b