Alright, let's work through 83780680 times 47934514 step by step
83780680 × 47934514 = 47934514 × (83780680)
+ 47934514 × 0 which equals 0
+ 47934514 × 80 that results in 3834761120
+ 47934514 × 600 what gives us 28760708400
+ 47934514 × 0000 resulting in 0
+ 47934514 × 80000 which equals 3834761120000
+ 47934514 × 700000 that is equal 33554159800000
+ 47934514 × 3000000 resulting in 143803542000000
+ 47934514 × 80000000 resulting in 3834761120000000

= 4015986178389520
