Distance is 700 nm. Can be checked by using a point on the approach and generating a way point relative to that. So, it FAT is 270 and there is a FF27 at 8nm, put FF27270/708 on an empty line in the legs pages of the FMC. Go to plan mode and step to centre the display on this point. Should be right at the end of your 700nm go around. Would be easier to do if you could put RWY27270/700 in, but the FMC does not allow way points relative to a RWYXX point.