A calculator is available in MOROS using double-precision binary floating-point format (float64).

It can be invocked from the shell with the command `calc`

and an operation
to perform in arguments:

```
> calc 2 + 2
4
```

It will open a REPL if no arguments are provided:

```
> calc
MOROS Calc v0.1.0
> 2 + 2
4
```

The following arithmetic operations are supported:

`+`

addition`-`

subtraction`*`

multiplication`/`

division`%`

modulo`^`

exponential

Parentheses `()`

can change the order of operations:

```
> 2 + 3 * 4
14
> (2 + 3) * 4
20
```