No problem, we've got 2104 and 3978 to multiply
2104 × 3978 = 3978 × (2104)
+ 3978 × 4 giving us 15912
+ 3978 × 00 resulting in 0
+ 3978 × 100 yielding 397800
+ 3978 × 2000 resulting in 7956000

= 8369712
