Alright, let's work through 63964405 times 85542009 step by step
63964405 × 85542009 = 85542009 × (63964405)
+ 85542009 × 5 that is equal 427710045
+ 85542009 × 00 resulting in 0
+ 85542009 × 400 that is equal 34216803600
+ 85542009 × 4000 that is equal 342168036000
+ 85542009 × 60000 that is equal 5132520540000
+ 85542009 × 900000 that equals 76987808100000
+ 85542009 × 3000000 resulting in 256626027000000
+ 85542009 × 60000000 that results in 5132520540000000

= 5471643708189645
