Alright, let's work through 71422592 times 80807557 step by step
71422592 × 80807557 = 80807557 × (71422592)
+ 80807557 × 2 that equals 161615114
+ 80807557 × 90 that equals 7272680130
+ 80807557 × 500 that is equal 40403778500
+ 80807557 × 2000 resulting in 161615114000
+ 80807557 × 20000 which equals 1616151140000
+ 80807557 × 400000 yielding 32323022800000
+ 80807557 × 1000000 that results in 80807557000000
+ 80807557 × 70000000 which equals 5656528990000000

= 5771485174127744
