Alright, let's work through 86908803 times 53488354 step by step
86908803 × 53488354 = 53488354 × (86908803)
+ 53488354 × 3 that is equal 160465062
+ 53488354 × 00 what gives us 0
+ 53488354 × 800 that results in 42790683200
+ 53488354 × 8000 resulting in 427906832000
+ 53488354 × 00000 that equals 0
+ 53488354 × 900000 giving us 48139518600000
+ 53488354 × 6000000 yielding 320930124000000
+ 53488354 × 80000000 giving us 4279068320000000

= 4648608820580262
