Multiply
100 x 280
28,000
72,000 / 9,000
8
1/2 x 14
7
1/5 / 4
1/20
56 x 70
3920
4,080 / 80
51
40 x 9/8
45
1/3 / 1/2
2/3
690 x 49
33,810
56 / 18
3 R2
3/4 x 2/3
1/2
21 / 4
5 1/4
7404 x 85
629,340
9670 / 54
179 R4
14/9 x 12/7
2 1/3
2/5 / 1/5
2