Alright, let's work through 15327274 times 64229407 step by step
15327274 × 64229407 = 64229407 × (15327274)
+ 64229407 × 4 that results in 256917628
+ 64229407 × 70 resulting in 4496058490
+ 64229407 × 200 that results in 12845881400
+ 64229407 × 7000 resulting in 449605849000
+ 64229407 × 20000 that results in 1284588140000
+ 64229407 × 300000 what gives us 19268822100000
+ 64229407 × 5000000 that results in 321147035000000
+ 64229407 × 10000000 that equals 642294070000000

= 984461719946518
