Alright, let's work through 86166998 times 87303904 step by step
86166998 × 87303904 = 87303904 × (86166998)
+ 87303904 × 8 that equals 698431232
+ 87303904 × 90 that results in 7857351360
+ 87303904 × 900 that is equal 78573513600
+ 87303904 × 6000 that results in 523823424000
+ 87303904 × 60000 what gives us 5238234240000
+ 87303904 × 100000 what gives us 8730390400000
+ 87303904 × 6000000 resulting in 523823424000000
+ 87303904 × 80000000 what gives us 6984312320000000

= 7522715321360192
