1x2x3x4x5x6x7.....x890x891.....x99988x99989......x8987678x8987679.......x100000000=? what is d ans of this?

This can be rewritten as 100,000,000! where n! or n factorial is defined as n(n-1)(n-2)(n-3)...3*2*1.

This can be evaluated using a program.

Edit:

By the way, if you only want an approximation, see

http://en.wikipedia.org/wiki/Stirling's_approximat...

It will be a very large number. You finish it with a load of dots, does this mean you intend the product to go on 'ad infinitum'? In that case, it will be an arbitrarily large number. Or infinity, to put it more crudely.

Its called a factorial

You just write

" 891! "

same thing

and usually you wont need to compute it

There can be a specific meaning of "d" in mathematics. Learn English.

this number is calling

891 facorial

and it's writing

891 !

It's not necessary to computing it !

sorry before i didn`t see the rest of the #`s 3.2270185052747550616484581169664eplus41

happy 2 help

3,996,669,600, oops didnt see all that