Alright, let's work through 71011887 times 9220131 step by step
71011887 × 9220131 = 9220131 × (71011887)
+ 9220131 × 7 that is equal 64540917
+ 9220131 × 80 resulting in 737610480
+ 9220131 × 800 that equals 7376104800
+ 9220131 × 1000 yielding 9220131000
+ 9220131 × 10000 that equals 92201310000
+ 9220131 × 000000 giving us 0
+ 9220131 × 1000000 that results in 9220131000000
+ 9220131 × 70000000 that is equal 645409170000000

= 654738900697197
