Alright, let's work through 7220305 times 71359157 step by step
7220305 × 71359157 = 71359157 × (7220305)
+ 71359157 × 5 resulting in 356795785
+ 71359157 × 00 producing 0
+ 71359157 × 300 which equals 21407747100
+ 71359157 × 0000 resulting in 0
+ 71359157 × 20000 what gives us 1427183140000
+ 71359157 × 200000 what gives us 14271831400000
+ 71359157 × 7000000 yielding 499514099000000

= 515234878082885
