No problem, we've got 5390 and 3678 to multiply
5390 × 3678 = 3678 × (5390)
+ 3678 × 0 producing 0
+ 3678 × 90 which equals 331020
+ 3678 × 300 that equals 1103400
+ 3678 × 5000 producing 18390000

= 19824420
