No problem, we've got 6421 and 4903 to multiply
6421 × 4903 = 4903 × (6421)
+ 4903 × 1 what gives us 4903
+ 4903 × 20 yielding 98060
+ 4903 × 400 giving us 1961200
+ 4903 × 6000 what gives us 29418000

= 31482163
