Alright, let's work through 21549846 times 82521213 step by step
21549846 × 82521213 = 82521213 × (21549846)
+ 82521213 × 6 what gives us 495127278
+ 82521213 × 40 that equals 3300848520
+ 82521213 × 800 that equals 66016970400
+ 82521213 × 9000 which equals 742690917000
+ 82521213 × 40000 what gives us 3300848520000
+ 82521213 × 500000 that equals 41260606500000
+ 82521213 × 1000000 yielding 82521213000000
+ 82521213 × 20000000 that equals 1650424260000000

= 1778319431883198
