This is an official demo for feflow plugin. It's a simple calculator.
For example, if you install the plugin, you can input command in terminal like this:
feflow add 1 2 3
# output: 6
feflow minus 1 2 3
# output: -4
feflow multiply 2 2 4
# output: 16
feflow divide 2 2 4
# output: 0.25