Alright, let's work through 66963173 times 671712 step by step
66963173 × 671712 = 671712 × (66963173)
+ 671712 × 3 resulting in 2015136
+ 671712 × 70 that equals 47019840
+ 671712 × 100 that is equal 67171200
+ 671712 × 3000 yielding 2015136000
+ 671712 × 60000 which equals 40302720000
+ 671712 × 900000 that results in 604540800000
+ 671712 × 6000000 which equals 4030272000000
+ 671712 × 60000000 yielding 40302720000000

= 44979966862176
