Alright, let's work through 10420052 times 64227789 step by step
10420052 × 64227789 = 64227789 × (10420052)
+ 64227789 × 2 that equals 128455578
+ 64227789 × 50 yielding 3211389450
+ 64227789 × 000 producing 0
+ 64227789 × 0000 yielding 0
+ 64227789 × 20000 producing 1284555780000
+ 64227789 × 400000 giving us 25691115600000
+ 64227789 × 0000000 that equals 0
+ 64227789 × 10000000 resulting in 642277890000000

= 669256901225028
