No problem, we've got 4231 and 5138 to multiply
4231 × 5138 = 5138 × (4231)
+ 5138 × 1 that is equal 5138
+ 5138 × 30 producing 154140
+ 5138 × 200 giving us 1027600
+ 5138 × 4000 that results in 20552000

= 21738878
