apcalc-dev software package provides Library for arbitrary precision arithmetic, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install apcalc-dev
apcalc-dev is installed in your system.
Make ensure the apcalc-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep apcalc-dev *
You will get with apcalc-dev package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Development |
| Package | apcalc-dev |
| Version | 2.12.5.0-1+b2 [mips, mipsel], |
| Description | Library for arbitrary precision arithmetic |
| Sub Section | devel |