We look at the division of 421920 by 29 
Our goal is to divide 421920 by 29.

On to step 1:
29 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 29

Step 2:
The number 29 fits into 42 1 times, leaving a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 29 away from 42, we end up with 13.
Bring next digit (1) of the dividend behind the 13 and repeat the process: 131 / 29

Step 3:
The number 29 fits into 131 4 times, leaving a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 14.0
If we take 116 away from 131, we end up with 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 29

Going ahead to step 4:
When dividing 159 by 29, we get 5 with a remainder of 14.
The number 5 becomes the next digit in our result. 
Result so far: 145.0
Subtract 145 from 159 to get 14.
Include the next digit (2) from the dividend after 14, then repeat: 142 / 29

Advancing to step 5:
If we divide 142 by 29, we get 4 and a remainder of 26.
Write down 4 as next digit of the result. 
Result so far: 1454.0
The remainder is 26 after subtracting 116 from 142.
Grab the next digit (0) from the dividend, add it to 26, then carry on: 260 / 29

Let's proceed to step 6:
The number 29 fits into 260 8 times, leaving a remainder of 28.
The next digit of our result is 8. 
Result so far: 14548.0
If we take 232 away from 260, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 7:
The number 29 fits into 280 9 times, leaving a remainder of 19.
Put 9 as the next digit of the answer. 
Result so far: 14548.9
Subtract 261 from 280 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 8:
If we divide 190 by 29, we get 6 and a remainder of 16.
The number 6 becomes the next digit in our result. 
Result so far: 14548.96
Subtract 174 from 190 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 9:
29 goes into 160 5 times with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 14548.965
Subtract 145 from 160 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 10:
29 can be fit into 150 5 times, resulting in a remainder of 5.
The next digit of our result is 5. 
Result so far: 14548.9655
Subtracting 145 from 150 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final result is 14548.9655 with a remainder of 5e-05.