Alright, let's work through 64124307 times 66984970 step by step
64124307 × 66984970 = 66984970 × (64124307)
+ 66984970 × 7 yielding 468894790
+ 66984970 × 00 resulting in 0
+ 66984970 × 300 that equals 20095491000
+ 66984970 × 4000 resulting in 267939880000
+ 66984970 × 20000 that results in 1339699400000
+ 66984970 × 100000 that equals 6698497000000
+ 66984970 × 4000000 giving us 267939880000000
+ 66984970 × 60000000 which equals 4019098200000000

= 4295364780665790
