Alright, let's work through 87388028 times 54240831 step by step
87388028 × 54240831 = 54240831 × (87388028)
+ 54240831 × 8 that equals 433926648
+ 54240831 × 20 that is equal 1084816620
+ 54240831 × 000 that is equal 0
+ 54240831 × 8000 that equals 433926648000
+ 54240831 × 80000 that is equal 4339266480000
+ 54240831 × 300000 resulting in 16272249300000
+ 54240831 × 7000000 giving us 379685817000000
+ 54240831 × 80000000 giving us 4339266480000000

= 4739999258171268
