Alright, let's work through 21520477 times 60856434 step by step
21520477 × 60856434 = 60856434 × (21520477)
+ 60856434 × 7 which equals 425995038
+ 60856434 × 70 that equals 4259950380
+ 60856434 × 400 that equals 24342573600
+ 60856434 × 0000 yielding 0
+ 60856434 × 20000 giving us 1217128680000
+ 60856434 × 500000 that results in 30428217000000
+ 60856434 × 1000000 yielding 60856434000000
+ 60856434 × 20000000 what gives us 1217128680000000

= 1309659488199018
