The room appears to be around 3-4 m in length. If we assume (for convenience) that he's in the middle that would be about 5 to 6,(6) Maderakas per Morlock I guess...
you don't need complicated maths, Lafanpan is 1 Materakas long, the same as Morlock thing, so after the use of the device, we can probably assume they ended at the same length.