Converts a value from the 480p coordinate space to the player's coordinate space. The conversion ratio between coordinate spaces is the ratio of their widths.

Format: Const480p(exprn)

Arguments:

- exprn (float): Expression containing the value to convert.

Return type: float

Error conditions: Returns 'Bottom' if exprn evaluates to 'Bottom'.

Notes:

Non-zero position and velocity offset values in common1.cns should use one of the Const triggers to maintain consistency with characters from a different coordinate space.

Example:

`value = Const480p(6)
; Sets value 3 if the player has a coordinate space of 320x240 (240p).
; Sets value 6 if the player has a coordinate space of 640x480 (480p).
; Sets value 12 if the player has a coordinate space of 1280x720 (720p).`