No problem, we've got 8381 and 5123 to multiply
8381 × 5123 = 5123 × (8381)
+ 5123 × 1 which equals 5123
+ 5123 × 80 yielding 409840
+ 5123 × 300 that equals 1536900
+ 5123 × 8000 resulting in 40984000

= 42935863
