Alright, let's work through 87100181 times 79009588 step by step
87100181 × 79009588 = 79009588 × (87100181)
+ 79009588 × 1 giving us 79009588
+ 79009588 × 80 that is equal 6320767040
+ 79009588 × 100 that is equal 7900958800
+ 79009588 × 0000 which equals 0
+ 79009588 × 00000 that is equal 0
+ 79009588 × 100000 that equals 7900958800000
+ 79009588 × 7000000 that equals 553067116000000
+ 79009588 × 80000000 which equals 6320767040000000

= 6881749415535428
