Alright, let's work through 87573083 times 63734834 step by step
87573083 × 63734834 = 63734834 × (87573083)
+ 63734834 × 3 that equals 191204502
+ 63734834 × 80 that equals 5098786720
+ 63734834 × 000 giving us 0
+ 63734834 × 3000 that results in 191204502000
+ 63734834 × 70000 that results in 4461438380000
+ 63734834 × 500000 that results in 31867417000000
+ 63734834 × 7000000 that results in 446143838000000
+ 63734834 × 80000000 what gives us 5098786720000000

= 5581455907873222
