A million-billion and a billion-million are the same thing; both represent a million multiplied by a billion, or 10^12 + 10^9. This is equal to one trillion. Therefore, a million-billion is equal to a billion-million.
Does not seem right to me.
A trillion is 1000 x a billion, is this not true?
I can’t see what is complicated. A million billion is a million multiplied by a billion which is exactly the same as a billion multiplied by a million.
Think - 2 times 3 is the same as 3 times 2 isn’t it?