No problem, we've got 8423 and 5580 to multiply
8423 × 5580 = 5580 × (8423)
+ 5580 × 3 what gives us 16740
+ 5580 × 20 that results in 111600
+ 5580 × 400 which equals 2232000
+ 5580 × 8000 what gives us 44640000

= 47000340
