Alright, let's work through 84423132 times 78944720 step by step
84423132 × 78944720 = 78944720 × (84423132)
+ 78944720 × 2 what gives us 157889440
+ 78944720 × 30 which equals 2368341600
+ 78944720 × 100 resulting in 7894472000
+ 78944720 × 3000 producing 236834160000
+ 78944720 × 20000 that results in 1578894400000
+ 78944720 × 400000 that is equal 31577888000000
+ 78944720 × 4000000 resulting in 315778880000000
+ 78944720 × 80000000 which equals 6315577600000000

= 6664760517263040
