I have Win7 and ubuntu partition in my laptotp. I downloaded Steam .deb package. 
I tried to install it by doubleclicking it, but it said:
Internal Error
The file “/home/djokosihono/Desktop/steam\_latest.deb” could not be opened. 
And when I try to install it using Terminal, it said:
dpkg: error processing steam\_latest.deb (--install):
 package architecture (i386) does not match system (amd64)
Errors were encountered while processing:
 steam\_latest.deb

It also happened when I try to install Google Chrome.

Is there any solutions for this? Thanks in advance.