Alright, let's work through 87187867 times 70163536 step by step
87187867 × 70163536 = 70163536 × (87187867)
+ 70163536 × 7 what gives us 491144752
+ 70163536 × 60 giving us 4209812160
+ 70163536 × 800 that is equal 56130828800
+ 70163536 × 7000 resulting in 491144752000
+ 70163536 × 80000 giving us 5613082880000
+ 70163536 × 100000 what gives us 7016353600000
+ 70163536 × 7000000 producing 491144752000000
+ 70163536 × 80000000 that results in 5613082880000000

= 6117409045017712
