Alright, let's work through 87170578 times 79761016 step by step
87170578 × 79761016 = 79761016 × (87170578)
+ 79761016 × 8 that is equal 638088128
+ 79761016 × 70 giving us 5583271120
+ 79761016 × 500 that results in 39880508000
+ 79761016 × 0000 which equals 0
+ 79761016 × 70000 that results in 5583271120000
+ 79761016 × 100000 yielding 7976101600000
+ 79761016 × 7000000 that equals 558327112000000
+ 79761016 × 80000000 giving us 6380881280000000

= 6952813866587248
