Megadigits

[judocallin02]

Help me please!

How many digits are in the number 2^2009 × 5^2005?

I've no idea how to begin.

 

[Aladdin]

http://www.freemathhelp.com/forum/viewtopic.php?f=9&t=33078

Hope this helps .

 

[judocallin02]

thanks