Alright, let's work through 21096138 times 63914580 step by step
21096138 × 63914580 = 63914580 × (21096138)
+ 63914580 × 8 producing 511316640
+ 63914580 × 30 which equals 1917437400
+ 63914580 × 100 giving us 6391458000
+ 63914580 × 6000 what gives us 383487480000
+ 63914580 × 90000 what gives us 5752312200000
+ 63914580 × 000000 giving us 0
+ 63914580 × 1000000 what gives us 63914580000000
+ 63914580 × 20000000 that is equal 1278291600000000

= 1348350799892040
