No problem, we've got 3871 and 5409 to multiply
3871 × 5409 = 5409 × (3871)
+ 5409 × 1 that equals 5409
+ 5409 × 70 that equals 378630
+ 5409 × 800 that results in 4327200
+ 5409 × 3000 yielding 16227000

= 20938239
