boj_4796

#코드 설명은 노션링크
l,p,v = 1, 1, 1
answer = []
while l!=0 and p!=0 and v != 0:
    
    l, p, v = map(int,input().split())
    if l!=0 and p!=0 and v != 0:
        tmp = (v // p) * l
        if v%p >= l:
            tmp += l
        else:
            tmp += v%p
        answer.append(tmp)
cnt = 1
for i in answer:
    print("Case %d: %d" %(cnt, i))
    cnt += 1