def solve(A, B, C):
    K = (A - 1) + B 
    cir = (C // K) * A
    rem = (C % K) if (C % K) <= (A - 1) else A
    return cir + rem


if __name__ == '__main__':
    A, B, C = map(int, input().split())
    print(solve(A, B, C))