구구단
x1=2 x1=3 x1=4 x1=5 x1=6 x1=7 x1=8 x1=9
x2=4 x2=6 x2=8 x2=10 x2=12 x2=14 x2=16 x2=18
x3=6 x3=9 x3=12 x3=15 x3=18 x3=21 x3=24 x3=27
x4=8 x4=12 x4=16 x4=20 x4=24 x4=28 x4=32 x4=36
x5=10 x5=15 x5=20 x5=25 x5=30 x5=35 x5=40 x5=45
x6=12 x6=18 x6=24 x6=30 x6=36 x6=42 x6=48 x6=54
x7=14 x7=21 x7=28 x7=35 x7=42 x7=49 x7=56 x7=63
x8=16 x8=24 x8=32 x8=40 x8=48 x8=56 x8=64 x8=72
x9=18 x9=27 x9=36 x9=45 x9=54 x9=63 x9=72 x9=81