Let's calculate 8641 x 9216
8641 × 9216 = 9216 × (8641)
+ 9216 × 1 resulting in 9216
+ 9216 × 40 resulting in 368640
+ 9216 × 600 that results in 5529600
+ 9216 × 8000 which equals 73728000

= 79635456
