How did you do your math?

On the back of a napkin while sitting in a bar in Tijuana.
I took an average SBD to steem price since the day I got here then added up my steem then took the total of all posts and converted to steem.

There is something very off about that calculator link, but it's nice wishful thinking. @wiser actually made a post about it awhile back asking the same question. I think it's using the ATH on steem price.