구구단
2x1=4 3x1=9 4x1=16 5x1=25 6x1=36 7x1=49 8x1=64 9x1=81
2x2=4 3x2=9 4x2=16 5x2=25 6x2=36 7x2=49 8x2=64 9x2=81
2x3=4 3x3=9 4x3=16 5x3=25 6x3=36 7x3=49 8x3=64 9x3=81
2x4=4 3x4=9 4x4=16 5x4=25 6x4=36 7x4=49 8x4=64 9x4=81
2x5=4 3x5=9 4x5=16 5x5=25 6x5=36 7x5=49 8x5=64 9x5=81
2x6=4 3x6=9 4x6=16 5x6=25 6x6=36 7x6=49 8x6=64 9x6=81
2x7=4 3x7=9 4x7=16 5x7=25 6x7=36 7x7=49 8x7=64 9x7=81
2x8=4 3x8=9 4x8=16 5x8=25 6x8=36 7x8=49 8x8=64 9x8=81
2x9=4 3x9=9 4x9=16 5x9=25 6x9=36 7x9=49 8x9=64 9x9=81