Alright, let's work through 16820385 times 24157004 step by step
16820385 × 24157004 = 24157004 × (16820385)
+ 24157004 × 5 producing 120785020
+ 24157004 × 80 producing 1932560320
+ 24157004 × 300 yielding 7247101200
+ 24157004 × 0000 that results in 0
+ 24157004 × 20000 yielding 483140080000
+ 24157004 × 800000 yielding 19325603200000
+ 24157004 × 6000000 giving us 144942024000000
+ 24157004 × 10000000 giving us 241570040000000

= 406330107726540
