No problem, we've got 5381 and 3454 to multiply
5381 × 3454 = 3454 × (5381)
+ 3454 × 1 which equals 3454
+ 3454 × 80 what gives us 276320
+ 3454 × 300 what gives us 1036200
+ 3454 × 5000 giving us 17270000

= 18585974
