Alright, let's work through 71003443 times 19915743 step by step
71003443 × 19915743 = 19915743 × (71003443)
+ 19915743 × 3 that results in 59747229
+ 19915743 × 40 yielding 796629720
+ 19915743 × 400 giving us 7966297200
+ 19915743 × 3000 giving us 59747229000
+ 19915743 × 00000 that equals 0
+ 19915743 × 000000 yielding 0
+ 19915743 × 1000000 what gives us 19915743000000
+ 19915743 × 70000000 resulting in 1394102010000000

= 1414086322903149
