Alright, let's work through 10386726 times 71320216 step by step
10386726 × 71320216 = 71320216 × (10386726)
+ 71320216 × 6 yielding 427921296
+ 71320216 × 20 that equals 1426404320
+ 71320216 × 700 producing 49924151200
+ 71320216 × 6000 giving us 427921296000
+ 71320216 × 80000 yielding 5705617280000
+ 71320216 × 300000 that results in 21396064800000
+ 71320216 × 0000000 resulting in 0
+ 71320216 × 10000000 that results in 713202160000000

= 740783541852816
