Alright, let's work through 13220729 times 53622151 step by step
13220729 × 53622151 = 53622151 × (13220729)
+ 53622151 × 9 that is equal 482599359
+ 53622151 × 20 that results in 1072443020
+ 53622151 × 700 yielding 37535505700
+ 53622151 × 0000 what gives us 0
+ 53622151 × 20000 resulting in 1072443020000
+ 53622151 × 200000 that equals 10724430200000
+ 53622151 × 3000000 producing 160866453000000
+ 53622151 × 10000000 that equals 536221510000000

= 708923926768079
