The answer is 667,927,153,405
wrong the answer is 667927153404.51
Emil26's is correct because he rounded off to the nearest ones. Why round off to the nearest ones? Because the data given are all whole numbers. And, Florie1, even if you include two decimal values, your answer is not correct, it should be 667, 927, 153, 404. 52 (not .51).
florie1 , next time , check the correct answer first.... :) no hard feelings.. ok?
its ok to make mistakes tho.. :)