Step 1: 9 5 4 / 20 8 15
= 1,080

Step 2: $4/9$ / $7/10$ / $8/3$ = $4/9$ $10/7$ $3/8$ = 0.17857

Step 3: 9/10 5/33 9/16
= 0.0021

Therefore, the final result is:
1,080; 0.17857; 0.0021