No problem, we've got 3863 and 9790 to multiply
3863 × 9790 = 9790 × (3863)
+ 9790 × 3 what gives us 29370
+ 9790 × 60 that results in 587400
+ 9790 × 800 what gives us 7832000
+ 9790 × 3000 which equals 29370000

= 37818770
