No problem, we've got 3543 and 3891 to multiply
3543 × 3891 = 3891 × (3543)
+ 3891 × 3 yielding 11673
+ 3891 × 40 that results in 155640
+ 3891 × 500 what gives us 1945500
+ 3891 × 3000 giving us 11673000

= 13785813
