If in the cases mentioned in s. 846.05 the defendant shall not, before judgment, bring into court the amount so due with costs the court before rendering judgment shall ascertain by reference or otherwise the situation of the mortgaged premises and whether they can be sold in parcels without injury to the interests of the parties; and if it shall appear that they can be so sold the judgment shall direct a sale in parcels, specifying them, or so much thereof as will be sufficient to pay the amount due for principal, interests and costs; and such judgment shall remain as security for any subsequent default.