Alright, let's work through 13420221 times 84844791 step by step
13420221 × 84844791 = 84844791 × (13420221)
+ 84844791 × 1 resulting in 84844791
+ 84844791 × 20 resulting in 1696895820
+ 84844791 × 200 that is equal 16968958200
+ 84844791 × 0000 that results in 0
+ 84844791 × 20000 yielding 1696895820000
+ 84844791 × 400000 that equals 33937916400000
+ 84844791 × 3000000 giving us 254534373000000
+ 84844791 × 10000000 which equals 848447910000000

= 1138635845918811
