Alright, let's work through 87640644 times 50947699 step by step
87640644 × 50947699 = 50947699 × (87640644)
+ 50947699 × 4 that results in 203790796
+ 50947699 × 40 producing 2037907960
+ 50947699 × 600 which equals 30568619400
+ 50947699 × 0000 resulting in 0
+ 50947699 × 40000 resulting in 2037907960000
+ 50947699 × 600000 that results in 30568619400000
+ 50947699 × 7000000 giving us 356633893000000
+ 50947699 × 80000000 that results in 4075815920000000

= 4465089150678156
