How to install and run Scilab manually?

How to install and run Scilab manually?

Firstly, I saw topics such as 'How to install manually a software ...' but my problem does't solve!
I've downloaded Scilab 5.4.1 from official website. And i extract '.tar.gz' file in :
/home/scilab-5.4.1
directory. I tried below commands but get several errors:
$ cd scalib-5.4.1
$ configure        @1
$ make             @2
$ make install     @3
Termianl Messages :
@1: configure: command not found
@2: make: * No targets specified and no makefile found. Stop.
@3: make: * No rule to make target `install'. Stop.
I tried following Terminal-Command to run that :
$ cd scilab-5.4.1
$ cd bin
$ scilab
Termianl message:
The program 'scilab' is currently not installed. You can install it by typing: sudo apt-get install scilab