Answers by visitors named: Damon - my way

my way 8*10^4 versus 400*10^4 so 400/8 or 50 times as many of B

You turn 800.5 into 8.005*10^2 so now you have 8.005 * 10^2 * 2 * 10^6 which is 8.005*2 * 10^8

whew :) great !