Multiply regs.
1/3*1/3
What is 1/9
1/1 * 1/1
What is 1/1
1 1/1 * 1 1/1
What is 4
1/3*1/5
What is 1/15
1/67*1/1
What is 1/67
2 2/2 * 2 2/2
What is 9
2/3*3/6
What is 1/3
1/42*1/2
What is 1/84
3 3/3 * 3 3/3
What is 16
3/2*5/6
What is 15/12
1/56*1/10
What is 1/560
1 2/7 * 1 3/5
What is 2 8/35 or 1 43/35
6/7*8/4
What is 12/24
1/67*1/2
What is 1/134
3 6/10 * 2 4/5
What is 10 4/50