No problem, we've got 3970 and 5123 to multiply
3970 × 5123 = 5123 × (3970)
+ 5123 × 0 that results in 0
+ 5123 × 70 yielding 358610
+ 5123 × 900 that results in 4610700
+ 5123 × 3000 that equals 15369000

= 20338310
