Yeah very simple math but you calculated it all  wrong.   Try to correct your calculation first before putting an argument over something that deals with math.  I am not that good in math either but your calculation is obviously wrong, and this as I said is a bonus in an ICO , basically they will get their token (amount of investment) and the bonus from the next investor who also get their token equivalent to the amount they invested.  And it seems you reply in a wrong account