ABC=input()
ABC=ABC.rstrip().split(" ")
A=int(ABC[0])
B=int(ABC[1])
C=int(ABC[2])
if C%(B+A-1)>(A-1):
    print(C//(B+A-1)*A+A)
else:
    print(C//(B+A-1)*A+C%(B+A-1))