tolong pakai cara ya plisss

3.4ha-200dam2-12500m2=....are
4×100-200-12500:100
400-200-125=75are
4.0,75ha-40are-1500m2=.......are
0,75×100-40-1500:100
75-40-15=20 are
5.18m2×100=1800 dm2
1800:450=4 karpet