how to scale shape in 1800 cms wridth and 150 cm height in after effects 1080*190

Unfortunately you are trying to combine physical measurements with digital ones.  When printed, the print resolution is required.  1080 pixels can be very small at 240 dpi (dots per inch) or a lot larger at 72 dpi. 

I'm guessing you are trying to design a poster or similar in After Effects to print out?   In the past, when I've done this I've exported the image and then used Photoshop to set its size and use that program's built-in upscaling to handle it.  You also have to consider that print materials use CYMK colours and not RGB.

If that's not what you're trying to do, can you explain a bit more, please?