Alright, let's work through 87455815 times 54042318 step by step
87455815 × 54042318 = 54042318 × (87455815)
+ 54042318 × 5 yielding 270211590
+ 54042318 × 10 that is equal 540423180
+ 54042318 × 800 that equals 43233854400
+ 54042318 × 5000 giving us 270211590000
+ 54042318 × 50000 which equals 2702115900000
+ 54042318 × 400000 resulting in 21616927200000
+ 54042318 × 7000000 yielding 378296226000000
+ 54042318 × 80000000 giving us 4323385440000000

= 4726314965179170
