how much is 9.0e9

$${\mathtt{9}}{\mathtt{\,\times\,}}{{\mathtt{e}}}^{{\mathtt{9}}} = {\mathtt{72\,927.755\: \!348\: \!178\: \!456\: \!069\: \!4}}$$

I did it on the web2 calculator!  You could have done that yourself.  

9*e⁹=72927.7553481784560694 that is my answer. I didn't copy Melody.

In many computer programming languages 9.0e9 can mean 9.0*10⁹ or 9 billion (often written as 9.0E9 as well). 

Indeed, this is what the calculator here thinks!

Thanks Alan.  There is a lot of room for confusion there.  It seems another example of 'silly' notation.