Alright, let's work through 15960705 times 45656221 step by step
15960705 × 45656221 = 45656221 × (15960705)
+ 45656221 × 5 resulting in 228281105
+ 45656221 × 00 giving us 0
+ 45656221 × 700 producing 31959354700
+ 45656221 × 0000 which equals 0
+ 45656221 × 60000 resulting in 2739373260000
+ 45656221 × 900000 resulting in 41090598900000
+ 45656221 × 5000000 that equals 228281105000000
+ 45656221 × 10000000 that results in 456562210000000

= 728705474795805
