P,C=map(int, input().split())
p=[2,3,5,7,11,13]
c=[4,6,8,9,10,12]
e=0
if P>0 and C>0:
    e = sum(p)/6*P * sum(c)/6*C
elif P>0:
    e = sum(p)/6*P
elif C>0:
    e = sum(c)/6*C
print(e)