No problem, we've got 7640 and 5978 to multiply
7640 × 5978 = 5978 × (7640)
+ 5978 × 0 resulting in 0
+ 5978 × 40 which equals 239120
+ 5978 × 600 giving us 3586800
+ 5978 × 7000 that is equal 41846000

= 45671920
