No problem, we've got 1931 and 4361 to multiply
1931 × 4361 = 4361 × (1931)
+ 4361 × 1 that results in 4361
+ 4361 × 30 that equals 130830
+ 4361 × 900 which equals 3924900
+ 4361 × 1000 that equals 4361000

= 8421091
