Hello....
for this failure .... you should go first for QRH 2.32...
look into the SLATS/FLAPS landing distance factor ...for your case (let's assume that the slats less than 1) so the factor is 1.8 X the LDG DIST .
to get the landing dist...go to QRH 4.03 ( use the configuration full incase you have a failure ) and let's assume your landing weight is 58 tons
the landing dist for the 58tons on a wet runway is 1110 meters.
so 1.8 X 1110 = 1998 meters ...
that's it.