Table:
0
A
B
C
D
E
1
land formation
area, km²
of which currently forests, km²
% forests
habitat type
2
Northern Moldavian Hills
4630
476
10.3%
forest steppe
3
Dniester-Rāut Ridge
2480
363
14.6%
forest steppe
4
Middle Prut Valley
2930
312
10.6%
forest steppe
5
Bălţi Steppe
1920
51
2.7%
steppe
6
Ciuluc-Soloneţ Hills
1690
169
10.0%
forest steppe
7
Corneşti Hills (Codru)
4740
1300
27.5%
forest
8
Lower Dniester Hills
3040
371
12.2%
forest steppe
9
Lower Prut Valley
1810
144
8.0%
forest steppe
10
Tigheci Hills
3550
533
15.0%
forest steppe
11
Bugeac Plain
3210
195
6.1%
steppe
12
part of Podolian Plateau
1920
175
9.1%
forest steppe
13
part of Eurasian Steppe
1920
140
7.3%
steppe

Questions and formulas:
Question: When middle prut valley is the land formation what is the highest of which currently forests, km² ?
Formula: MAXIFS(C1,A1,"Middle Prut Valley")
Formula2: MAXIFS(C2:C13,A2:A13,"Middle Prut Valley")
Level: easy
Question: When 312 is  of which currently forests, km² what is the land formation? 
Formula: LET(query1,SUMMARIZE(A1,SUMX(C1)),FILTER(query1,CHOOSECOLS(query1,2)=312))
Formula2: LET(query1,SUMMARIZE(A2:A13,SUMX(C2:C13)),FILTER(query1,CHOOSECOLS(query1,2)=312))
Level: hard