Alright, let's work through 71381780 times 61710167 step by step
71381780 × 61710167 = 61710167 × (71381780)
+ 61710167 × 0 giving us 0
+ 61710167 × 80 resulting in 4936813360
+ 61710167 × 700 what gives us 43197116900
+ 61710167 × 1000 producing 61710167000
+ 61710167 × 80000 that equals 4936813360000
+ 61710167 × 300000 that equals 18513050100000
+ 61710167 × 1000000 what gives us 61710167000000
+ 61710167 × 70000000 giving us 4319711690000000

= 4404981564557260
