Alright, let's work through 86904378 times 69382269 step by step
86904378 × 69382269 = 69382269 × (86904378)
+ 69382269 × 8 that equals 555058152
+ 69382269 × 70 producing 4856758830
+ 69382269 × 300 producing 20814680700
+ 69382269 × 4000 what gives us 277529076000
+ 69382269 × 00000 that equals 0
+ 69382269 × 900000 that is equal 62444042100000
+ 69382269 × 6000000 that equals 416293614000000
+ 69382269 × 80000000 giving us 5550581520000000

= 6029622931673682
