Alright, let's work through 21236447 times 10266341 step by step
21236447 × 10266341 = 10266341 × (21236447)
+ 10266341 × 7 that is equal 71864387
+ 10266341 × 40 that equals 410653640
+ 10266341 × 400 that results in 4106536400
+ 10266341 × 6000 giving us 61598046000
+ 10266341 × 30000 which equals 307990230000
+ 10266341 × 200000 what gives us 2053268200000
+ 10266341 × 1000000 what gives us 10266341000000
+ 10266341 × 20000000 resulting in 205326820000000

= 218020606530427
