Alright, let's work through 84170223 times 86734836 step by step
84170223 × 86734836 = 86734836 × (84170223)
+ 86734836 × 3 resulting in 260204508
+ 86734836 × 20 that is equal 1734696720
+ 86734836 × 200 that is equal 17346967200
+ 86734836 × 0000 what gives us 0
+ 86734836 × 70000 that results in 6071438520000
+ 86734836 × 100000 that results in 8673483600000
+ 86734836 × 4000000 giving us 346939344000000
+ 86734836 × 80000000 that is equal 6938786880000000

= 7300490487988428
