No problem, we've got 7863 and 9892 to multiply
7863 × 9892 = 9892 × (7863)
+ 9892 × 3 that results in 29676
+ 9892 × 60 what gives us 593520
+ 9892 × 800 that results in 7913600
+ 9892 × 7000 resulting in 69244000

= 77780796
