Alright, let's work through 63693442 times 10509830 step by step
63693442 × 10509830 = 10509830 × (63693442)
+ 10509830 × 2 that results in 21019660
+ 10509830 × 40 which equals 420393200
+ 10509830 × 400 what gives us 4203932000
+ 10509830 × 3000 yielding 31529490000
+ 10509830 × 90000 that equals 945884700000
+ 10509830 × 600000 that is equal 6305898000000
+ 10509830 × 3000000 yielding 31529490000000
+ 10509830 × 60000000 resulting in 630589800000000

= 669407247534860
