Alright, let's work through 87998086 times 80898178 step by step
87998086 × 80898178 = 80898178 × (87998086)
+ 80898178 × 6 yielding 485389068
+ 80898178 × 80 that equals 6471854240
+ 80898178 × 000 that equals 0
+ 80898178 × 8000 yielding 647185424000
+ 80898178 × 90000 resulting in 7280836020000
+ 80898178 × 900000 that is equal 72808360200000
+ 80898178 × 7000000 that results in 566287246000000
+ 80898178 × 80000000 resulting in 6471854240000000

= 7118884824887308
