Alright, let's work through 84789739 times 13457792 step by step
84789739 × 13457792 = 13457792 × (84789739)
+ 13457792 × 9 giving us 121120128
+ 13457792 × 30 that is equal 403733760
+ 13457792 × 700 that results in 9420454400
+ 13457792 × 9000 resulting in 121120128000
+ 13457792 × 80000 that equals 1076623360000
+ 13457792 × 700000 what gives us 9420454400000
+ 13457792 × 4000000 that is equal 53831168000000
+ 13457792 × 80000000 that is equal 1076623360000000

= 1141082671196288
