Alright, let's work through 21513082 times 16047666 step by step
21513082 × 16047666 = 16047666 × (21513082)
+ 16047666 × 2 which equals 32095332
+ 16047666 × 80 that is equal 1283813280
+ 16047666 × 000 producing 0
+ 16047666 × 3000 giving us 48142998000
+ 16047666 × 10000 what gives us 160476660000
+ 16047666 × 500000 what gives us 8023833000000
+ 16047666 × 1000000 producing 16047666000000
+ 16047666 × 20000000 yielding 320953320000000

= 345234754566612
