No problem, we've got 7881 and 2543 to multiply
7881 × 2543 = 2543 × (7881)
+ 2543 × 1 which equals 2543
+ 2543 × 80 resulting in 203440
+ 2543 × 800 yielding 2034400
+ 2543 × 7000 yielding 17801000

= 20041383
