No problem, we've got 21367815 and 80404499 to multiply
21367815 × 80404499 = 80404499 × (21367815)
+ 80404499 × 5 which equals 402022495
+ 80404499 × 10 giving us 804044990
+ 80404499 × 800 what gives us 64323599200
+ 80404499 × 7000 yielding 562831493000
+ 80404499 × 60000 producing 4824269940000
+ 80404499 × 300000 which equals 24121349700000
+ 80404499 × 1000000 that equals 80404499000000
+ 80404499 × 20000000 giving us 1608089980000000

= 1718068459799685
