5 7 7 7 x
7
x
1
=
7
x
2
=
14
7
x
3
=
21
7
x
4
=
28
7
x
=
35
7
x
6
=
42
7
7
=
49
7
x
8
=
56
x
9
=
63
x
10
=
7
0