(18 + 18) * 36 = 1296px - 18px = 1278px &bnsp; [ margin on right except last div]

1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
2 Col
2 Col
2 Col
2 Col
2 Col
2 Col
2 Col
2 Col
2 Col
2 Col
2 Col
2 Col
2 Col
2 Col
2 Col
2 Col
2 Col
2 Col
3 Column
3 Column
3 Column
3 Column
3 Column
3 Column
3 Column
3 Column
3 Column
3 Column
3 Column
3 Column
4 Col – 126px
4 Col – 126px
4 Col – 126px
4 Col – 126px
4 Col – 126px
4 Col – 126px
4 Col – 126px
4 Col – 126px
4 Col – 126px


(18 + 18) * 36 = 1296px - 18px = 1278px &bnsp; [ margin on right except last div]

1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
1c
2 col
2 col
2 col
2 col
2 col
2 col
2 col
2 col
2 col
2 col
2 col
2 col
2 col
2 col
2 col
2 col
2 col
2 col
2 col
3 Col
3 Col
3 Col
3 Col
3 Col
3 Col
3 Col
3 Col
3 Col
3 Col
3 Col
3 Col
3 Col
4 Col
4 Col
4 Col
4 Col
4 Col
4 Col
4 Col
4 Col
4 Col


(18 + 12) * 36 = 1080px

col 3

col 12

col 15

col 6

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

c 1

col 2

col 2

col 2

col 2

col 2

col 2

col 2

col 2

col 2

col 2

col 2

col 2

col 2

col 2

col 2

col 2

col 2

col 2


col 18

col 18


col 3

col 3

col 3

col 3

col 3

col 3

col 3

col 3

col 3

col 3

col 3

col 3

.

col 4

col 4

col 4

col 4

col 4

col 4

col 4

col 4

col 4

col 5

col 5

col 5

col 5

col 5

col 5

col 5

col 1


col 6

col 6

col 6

col 6

col 6

col 6


col 7

col 7

col 7

col 7

col 7

col 1


col 8

col 10

col 8

col 10


col 9

col 9

col 9

col 9


col 11

col 7

col 11

col 7


col 12

col 12

col 12


col 18

col 18

col 18