2x1=2/2x2=4/2x3=6/2x4=8/2x5=10/2x6=12/2x7=14/2x8=16/2x9=18/3x1=3/3x2=6/3x3=9/3x4=12/3x5=15/3x6=18/3x7=21/3x8=24/3x9=27/4x1=4/4x2=8/4x3=12/4x4=16/
당신은 어느 그룹입니까?