Alright, let's work through 20408370 times 97802355 step by step
20408370 × 97802355 = 97802355 × (20408370)
+ 97802355 × 0 resulting in 0
+ 97802355 × 70 resulting in 6846164850
+ 97802355 × 300 what gives us 29340706500
+ 97802355 × 8000 that is equal 782418840000
+ 97802355 × 00000 what gives us 0
+ 97802355 × 400000 that equals 39120942000000
+ 97802355 × 0000000 producing 0
+ 97802355 × 20000000 producing 1956047100000000

= 1995986647711350
