6:6=1
1×6=6
6:1=6
6×1=6
0:6=0
0×6=0
7:1=7
7×1=7
0:4=0
0×4=0
50:10=5
5×10=50
90:10=9
9×10=90
80:8=10
10×8=80
70:10=7
7×10=70
