Alright, let's work through 87142733 times 89555559 step by step
87142733 × 89555559 = 89555559 × (87142733)
+ 89555559 × 3 producing 268666677
+ 89555559 × 30 that equals 2686666770
+ 89555559 × 700 yielding 62688891300
+ 89555559 × 2000 resulting in 179111118000
+ 89555559 × 40000 that results in 3582222360000
+ 89555559 × 100000 that results in 8955555900000
+ 89555559 × 7000000 that results in 626888913000000
+ 89555559 × 80000000 giving us 7164444720000000

= 7804116166602747
