Alright, let's work through 21380294 times 80323573 step by step
21380294 × 80323573 = 80323573 × (21380294)
+ 80323573 × 4 that results in 321294292
+ 80323573 × 90 giving us 7229121570
+ 80323573 × 200 yielding 16064714600
+ 80323573 × 0000 that equals 0
+ 80323573 × 80000 which equals 6425885840000
+ 80323573 × 300000 which equals 24097071900000
+ 80323573 × 1000000 yielding 80323573000000
+ 80323573 × 20000000 producing 1606471460000000

= 1717341605870462
