Write and test the following function:

def footage$\_$to$\_$acres$($square$\_$feet$)$:

$"""$

$-------------------------------------------------------$

Converts square footage to acres.

Use: acres $=$ footage$\_$to$\_$acres$($square$\_$feet$)$

$-------------------------------------------------------$

Parameters:

square$\_$feet $-$ area in square feet $($float $>=0)$

Returns:

acres $-$ square$\_$footage in acres $($float$)$

$------------------------------------------------------$

$"""$