Alright, let's work through 87104271 times 71104662 step by step
87104271 × 71104662 = 71104662 × (87104271)
+ 71104662 × 1 giving us 71104662
+ 71104662 × 70 producing 4977326340
+ 71104662 × 200 that results in 14220932400
+ 71104662 × 4000 that results in 284418648000
+ 71104662 × 00000 that is equal 0
+ 71104662 × 100000 that results in 7110466200000
+ 71104662 × 7000000 that is equal 497732634000000
+ 71104662 × 80000000 that equals 5688372960000000

= 6193519748211402
