Alright, let's work through 71400927 times 75425643 step by step
71400927 × 75425643 = 75425643 × (71400927)
+ 75425643 × 7 which equals 527979501
+ 75425643 × 20 producing 1508512860
+ 75425643 × 900 that is equal 67883078700
+ 75425643 × 0000 that results in 0
+ 75425643 × 00000 producing 0
+ 75425643 × 400000 yielding 30170257200000
+ 75425643 × 1000000 producing 75425643000000
+ 75425643 × 70000000 that equals 5279795010000000

= 5385460829771061
