Partial Product
3 X 215
645
12 X 52
624
3 X 15
45
12 X 26 -> 10 X 20
Underestimate
8 X 342
2,736
11 X 45
495
13 x 26
338
14 X 36 -> 20 X 40
Overestimate
9 X 573
5,157
13 X 67
871
24 X 84
2,016
35 X 81 -> 40 X 80
Both
11 X 326
3,586
35 X 94
3,290
22 X 561
12,342
78 X 36 -> 70 X 40
37 X 763
28,231
92 X 532
48,944
76 X 578
43,928
64 X 89 -> 40 X 100
NOT REASONABLE