$ sudo apt-get update
$ sudo apt-get install libtemplate-plugin-number-form

libtemplate-plugin-number-form is installed in your system.

Make ensure the libtemplate-plugin-number-form package were installed using the commands given below,

$ sudo dpkg-query -l | grep libtemplate-plugin-number-form*

You will get with libtemplate-plugin-number-form package name, version, architecture and description in a table

libtemplate-plugin-number-form package basic information: