No problem, we've got 3947 and 8920 to multiply
3947 × 8920 = 8920 × (3947)
+ 8920 × 7 giving us 62440
+ 8920 × 40 which equals 356800
+ 8920 × 900 that results in 8028000
+ 8920 × 3000 that results in 26760000

= 35207240
