Alright, let's work through 66648460 times 10507910 step by step
66648460 × 10507910 = 10507910 × (66648460)
+ 10507910 × 0 producing 0
+ 10507910 × 60 which equals 630474600
+ 10507910 × 400 yielding 4203164000
+ 10507910 × 8000 that results in 84063280000
+ 10507910 × 40000 what gives us 420316400000
+ 10507910 × 600000 which equals 6304746000000
+ 10507910 × 6000000 resulting in 63047460000000
+ 10507910 × 60000000 that equals 630474600000000

= 700336019318600
