Alright, let's work through 80296923 times 55153015 step by step
80296923 × 55153015 = 55153015 × (80296923)
+ 55153015 × 3 which equals 165459045
+ 55153015 × 20 giving us 1103060300
+ 55153015 × 900 that is equal 49637713500
+ 55153015 × 6000 resulting in 330918090000
+ 55153015 × 90000 producing 4963771350000
+ 55153015 × 200000 which equals 11030603000000
+ 55153015 × 0000000 yielding 0
+ 55153015 × 80000000 that results in 4412241200000000

= 4428617398672845
