1·1=1,1·2=2,1·3=3,1·4=4,1·5=5,1·6=6,1·7=7,1·8=8,1·9=9,2·2=4,2·3=6,2·4=8,2·5=10,2·6=12,2·7=14,2·8=16,2·9=18,3·3=9,3·4=12,3·5=15,3·6=18,3·7=21,3·8=24,3·9=27,4·4=16,4·5=20,4·6=24,4·7=28,4·8=32,4·9=36,5·5=25,5·6=30,5·7=35,5·8=40,5·9=45,6·6=36,6·7=42,6·8=48,6·9=54,7·7=49,7·8=56,7·9=63,8·8=64,8·9=72,9·9=81.btc