No problem, we've got 4711 and 8470 to multiply
4711 × 8470 = 8470 × (4711)
+ 8470 × 1 what gives us 8470
+ 8470 × 10 giving us 84700
+ 8470 × 700 producing 5929000
+ 8470 × 4000 what gives us 33880000

= 39902170
