Table:
text: Geography of Moldova
Natural habitat
Natural habitat
land_formation area_km² of_which_currently_forests_km² _forests habitat_type
Northern Moldavian Hills 4630 476 10.3% forest steppe
Dniester-Rāut Ridge 2480 363 14.6% forest steppe
Middle Prut Valley 2930 312 10.6% forest steppe
Bălţi Steppe 1920 51 2.7% steppe
Ciuluc-Soloneţ Hills 1690 169 10.0% forest steppe
Corneşti Hills (Codru) 4740 1300 27.5% forest
Lower Dniester Hills 3040 371 12.2% forest steppe
Lower Prut Valley 1810 144 8.0% forest steppe
Tigheci Hills 3550 533 15.0% forest steppe
Bugeac Plain 3210 195 6.1% steppe
part of Podolian Plateau 1920 175 9.1% forest steppe
part of Eurasian Steppe 1920 140 7.3% steppe

Question: In the geography of Moldova, if 312 of them are currently forests, km², what is the land formation?