Alright, let's work through 71936373 times 90207821 step by step
71936373 × 90207821 = 90207821 × (71936373)
+ 90207821 × 3 producing 270623463
+ 90207821 × 70 producing 6314547470
+ 90207821 × 300 what gives us 27062346300
+ 90207821 × 6000 that results in 541246926000
+ 90207821 × 30000 giving us 2706234630000
+ 90207821 × 900000 giving us 81187038900000
+ 90207821 × 1000000 that results in 90207821000000
+ 90207821 × 70000000 giving us 6314547470000000

= 6489223458973233
