Alright, let's work through 78693998 times 28809923 step by step
78693998 × 28809923 = 28809923 × (78693998)
+ 28809923 × 8 what gives us 230479384
+ 28809923 × 90 that results in 2592893070
+ 28809923 × 900 which equals 25928930700
+ 28809923 × 3000 producing 86429769000
+ 28809923 × 90000 yielding 2592893070000
+ 28809923 × 600000 producing 17285953800000
+ 28809923 × 8000000 that is equal 230479384000000
+ 28809923 × 70000000 that equals 2016694610000000

= 2267168022942154
