Alright, let's work through 87397760 times 85885349 step by step
87397760 × 85885349 = 85885349 × (87397760)
+ 85885349 × 0 yielding 0
+ 85885349 × 60 that equals 5153120940
+ 85885349 × 700 giving us 60119744300
+ 85885349 × 7000 that equals 601197443000
+ 85885349 × 90000 giving us 7729681410000
+ 85885349 × 300000 producing 25765604700000
+ 85885349 × 7000000 that results in 601197443000000
+ 85885349 × 80000000 resulting in 6870827920000000

= 7506187119418240
