No problem, we've got 8184521 and 8007121 to multiply
8184521 × 8007121 = 8007121 × (8184521)
+ 8007121 × 1 giving us 8007121
+ 8007121 × 20 which equals 160142420
+ 8007121 × 500 producing 4003560500
+ 8007121 × 4000 that is equal 32028484000
+ 8007121 × 80000 resulting in 640569680000
+ 8007121 × 100000 giving us 800712100000
+ 8007121 × 8000000 that is equal 64056968000000

= 65534449974041
