Alright, let's work through 21174521 times 42671337 step by step
21174521 × 42671337 = 42671337 × (21174521)
+ 42671337 × 1 which equals 42671337
+ 42671337 × 20 what gives us 853426740
+ 42671337 × 500 that is equal 21335668500
+ 42671337 × 4000 that results in 170685348000
+ 42671337 × 70000 which equals 2986993590000
+ 42671337 × 100000 which equals 4267133700000
+ 42671337 × 1000000 producing 42671337000000
+ 42671337 × 20000000 that equals 853426740000000

= 903545121404577
