Alright, let's work through 87425242 times 81671710 step by step
87425242 × 81671710 = 81671710 × (87425242)
+ 81671710 × 2 giving us 163343420
+ 81671710 × 40 giving us 3266868400
+ 81671710 × 200 that is equal 16334342000
+ 81671710 × 5000 resulting in 408358550000
+ 81671710 × 20000 what gives us 1633434200000
+ 81671710 × 400000 which equals 32668684000000
+ 81671710 × 7000000 producing 571701970000000
+ 81671710 × 80000000 producing 6533736800000000

= 7140169011303820
