No problem, we've got 8397 and 3680 to multiply
8397 × 3680 = 3680 × (8397)
+ 3680 × 7 resulting in 25760
+ 3680 × 90 what gives us 331200
+ 3680 × 300 which equals 1104000
+ 3680 × 8000 that equals 29440000

= 30900960
