FrozenCrash/Zadachi — comment on commit d3d4d1165756ec18b6241091dacc97a9b2993578
File:  line 0
By gmile:

Your should pass an argument to a method if one expects it. I.e.

```ruby
def my_method(some_argument)
...
end

puts my_method("lalala")
```
In your case you have several options:

```ruby
def r(l)
pi = Math::PI
r = l/(2*pi)
end

def s(r)
s = pi * r**2
end

l = 6
my_r = r(l)
my_s = s(my_r)

puts my_s
```