9 l p .............3 l l................63 kg
3l p ..............4 l l................30kg}x3
9l p...............12 l l.......………90kg
\...................9 l l .....…………27kg
27:9=3kg (1 l l)
3x3=9 kg (3 l l )
63-9=54kg (9 l p)
54:9=6 kg (1 l p)
3x5=15 kg ( 5 l l )
