Jelly Jars

compotjar = int(input())
jellyjar =int(input())

cherryPrice = 3.20

compotjarQuantity = compotjar+1

jellyjarQuantity = jellyjar+1

totalCherriesCompot = (compotjarQuantity*0.300)+0.05*(compotjarQuantity*0.300)

totalCherriesJelly= (jellyjarQuantity*0.650)+0.1*(jellyjarQuantity*0.650)


totalCherries= totalCherriesCompot+totalCherriesJelly

totalPrice = totalCherries*cherryPrice

print(round(totalPrice,2))