4221421 divided by 429 
We're looking to find how many times 429 goes into 4221421.

Advancing to step 1:
If we divide 4 by 429, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 429

Moving on to step 2:
429 can be fit into 42 0 times, resulting in a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Fetch the next digit (2) from the dividend, attach it to 42 and continue: 422 / 429

Going ahead to step 3:
429 goes into 422 0 times with a remainder of 422.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 422 to get 422.
Take the next digit (1) from the dividend and append it to 422, then repeat: 4221 / 429

On to step 4:
The number 429 fits into 4221 9 times, leaving a remainder of 360.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 3861 from 4221 to get 360.
Take the next digit (4) from the dividend and append it to 360, then repeat: 3604 / 429

Step 5:
When dividing 3604 by 429, we get 8 with a remainder of 172.
The next digit of our result is 8. 
Result so far: 98.0
If we subtract 3432 from 3604, we get 172.
Include the next digit (2) from the dividend after 172, then repeat: 1722 / 429

Step 6:
429 can be fit into 1722 4 times, resulting in a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 984.0
Deduct 1716 from 1722 and we're left with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 429

On to step 7:
When dividing 61 by 429, we get 0 with a remainder of 61.
Write down 0 as next digit of the result. 
Result so far: 9840.0
If we take 0 away from 61, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

On to step 8:
610 divided by 429 is 1 with a remainder of 181.
Use 1 as the next digit of our solution. 
Result so far: 9840.1
If we subtract 429 from 610, we get 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Going ahead to step 9:
1810 divided by 429 is 4 with a remainder of 94.
Record the quotient 4 as the next digit in the result. 
Result so far: 9840.14
Subtracting 1716 from 1810 leaves us with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Step 10:
940 divided by 429 is 2 with a remainder of 82.
The next digit of our result is 2. 
Result so far: 9840.142
If we subtract 858 from 940, we get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Step 11:
820 divided by 429 is 1 with a remainder of 391.
Put 1 as the next digit of the answer. 
Result so far: 9840.1421
If we subtract 429 from 820, we get 391.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3910, and continue the process.

Going ahead to step 12:
The number 429 fits into 3910 9 times, leaving a remainder of 49.
Put 9 as the next digit of the answer. 
Result so far: 9840.14219
Subtracting 3861 from 3910 leaves us with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

On to step 13:
The number 429 fits into 490 1 times, leaving a remainder of 61.
Use 1 as the next digit of our solution. 
Result so far: 9840.142191
If we subtract 429 from 490, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Let's proceed to step 14:
429 can be fit into 610 1 times, resulting in a remainder of 181.
Use 1 as the next digit of our solution. 
Result so far: 9840.1421911
If we take 429 away from 610, we end up with 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Our division results in 9840.1421911 with a remaining 1.81e-06.