https://ru-static.z-dn.net/files/dc9/afccefc126e5695efbb22b8ac965db19.jpg
C4H10=12×4+1×10
C4H10=58
C7H12=12×7+1×12
C7H12=96
C3H6=12×3+1×6
C3H6=42
C2H4=12×2+1×4
C2H4=28
так то изи, жду 5 звезд)