No problem, we've got 4124 and 4870 to multiply
4124 × 4870 = 4870 × (4124)
+ 4870 × 4 yielding 19480
+ 4870 × 20 producing 97400
+ 4870 × 100 that results in 487000
+ 4870 × 4000 producing 19480000

= 20083880
