Alright, let's work through 28672009 times 11186430 step by step
28672009 × 11186430 = 11186430 × (28672009)
+ 11186430 × 9 giving us 100677870
+ 11186430 × 00 yielding 0
+ 11186430 × 000 what gives us 0
+ 11186430 × 2000 what gives us 22372860000
+ 11186430 × 70000 what gives us 783050100000
+ 11186430 × 600000 yielding 6711858000000
+ 11186430 × 8000000 giving us 89491440000000
+ 11186430 × 20000000 yielding 223728600000000

= 320737421637870
