This still doesn’t answer the math question.
Your reply is a non sequiter either way. Ash falls from chimneys. That doesn’t mean it was ash from corpses.
Discussion
Have YOU done the math on whether or not that's feasible? You're the one making an extraordinary claim here.
Bro ash doesn't fall from chimneys when you're just burning a normal amount of stuff for heating buildings especially attached to a facility where people were rescued from it and said that's what was happening. You're so far detached from reality
I know a fabricator guy who used to do work on pet crematorium. After he had experience fixing and maintaining them, he came to the conclusion that it was simply impossible for the crematoriums to process that many bodies within the claimed time frame. Even if they ran 24/7 with no downtime for maintenance it would be impossible. The bodies would have to be completely burned in something like two minutes which is impossible.