No problem, we've got 7640 and 8807 to multiply
7640 × 8807 = 8807 × (7640)
+ 8807 × 0 which equals 0
+ 8807 × 40 what gives us 352280
+ 8807 × 600 what gives us 5284200
+ 8807 × 7000 that is equal 61649000

= 67285480
