Alright, let's work through 87863345 times 72075854 step by step
87863345 × 72075854 = 72075854 × (87863345)
+ 72075854 × 5 resulting in 360379270
+ 72075854 × 40 which equals 2883034160
+ 72075854 × 300 that equals 21622756200
+ 72075854 × 3000 giving us 216227562000
+ 72075854 × 60000 giving us 4324551240000
+ 72075854 × 800000 resulting in 57660683200000
+ 72075854 × 7000000 producing 504530978000000
+ 72075854 × 80000000 that is equal 5766068320000000

= 6332825626171630
