No problem, we've got 3823 and 4245 to multiply
3823 × 4245 = 4245 × (3823)
+ 4245 × 3 what gives us 12735
+ 4245 × 20 giving us 84900
+ 4245 × 800 giving us 3396000
+ 4245 × 3000 giving us 12735000

= 16228635
