No problem, we've got 2291 and 1981 to multiply
2291 × 1981 = 1981 × (2291)
+ 1981 × 1 giving us 1981
+ 1981 × 90 yielding 178290
+ 1981 × 200 that equals 396200
+ 1981 × 2000 that results in 3962000

= 4538471
