If you use bc (a command line calculator) frequently, you probably want floating point division by default. You can type “scale=8” every time you open it, or you can set up some environment arguments to have that be your default every time you open it.

Create a .bc file in your home directory that includes:

scale=8

Edit a file that is executed every time you log in (such as .bashrc) to include the line:

export BC_ENV_ARGS=~/.bc