Alright, let's work through 3963293 times 61236064 step by step
3963293 × 61236064 = 61236064 × (3963293)
+ 61236064 × 3 that results in 183708192
+ 61236064 × 90 that results in 5511245760
+ 61236064 × 200 that results in 12247212800
+ 61236064 × 3000 resulting in 183708192000
+ 61236064 × 60000 that equals 3674163840000
+ 61236064 × 900000 that equals 55112457600000
+ 61236064 × 3000000 which equals 183708192000000

= 242696463798752
