No problem, we've got 4213 and 5191 to multiply
4213 × 5191 = 5191 × (4213)
+ 5191 × 3 giving us 15573
+ 5191 × 10 yielding 51910
+ 5191 × 200 yielding 1038200
+ 5191 × 4000 giving us 20764000

= 21869683
