Alright, let's work through 12099533 times 20876653 step by step
12099533 × 20876653 = 20876653 × (12099533)
+ 20876653 × 3 yielding 62629959
+ 20876653 × 30 yielding 626299590
+ 20876653 × 500 that results in 10438326500
+ 20876653 × 9000 resulting in 187889877000
+ 20876653 × 90000 giving us 1878898770000
+ 20876653 × 000000 that results in 0
+ 20876653 × 2000000 that results in 41753306000000
+ 20876653 × 10000000 giving us 208766530000000

= 252597751903049
