Alright, let's work through 20407230 times 78269967 step by step
20407230 × 78269967 = 78269967 × (20407230)
+ 78269967 × 0 which equals 0
+ 78269967 × 30 yielding 2348099010
+ 78269967 × 200 resulting in 15653993400
+ 78269967 × 7000 producing 547889769000
+ 78269967 × 00000 that is equal 0
+ 78269967 × 400000 yielding 31307986800000
+ 78269967 × 0000000 that is equal 0
+ 78269967 × 20000000 producing 1565399340000000

= 1597273218661410
