We divide 39920231 by 421
Our goal is to divide 39920231 by 421.

Going ahead to step 1:
If we divide 3 by 421, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 421

Going ahead to step 2:
If we divide 39 by 421, we get 0 and a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Fetch the next digit (9) from the dividend, attach it to 39 and continue: 399 / 421

On to step 3:
421 goes into 399 0 times with a remainder of 399.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 399 leaves us with 399.
Take the next digit (2) from the dividend and append it to 399, then repeat: 3992 / 421

Advancing to step 4:
The number 421 fits into 3992 9 times, leaving a remainder of 203.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtracting 3789 from 3992 leaves us with 203.
Bring next digit (0) of the dividend behind the 203 and repeat the process: 2030 / 421

Let's proceed to step 5:
421 goes into 2030 4 times with a remainder of 346.
Record the quotient 4 as the next digit in the result. 
Result so far: 94.0
Deduct 1684 from 2030 and we're left with 346.
Append the next digit (2) from the dividend to 346 and continue with: 3462 / 421

Moving on to step 6:
3462 divided by 421 is 8 with a remainder of 94.
The number 8 becomes the next digit in our result. 
Result so far: 948.0
Subtracting 3368 from 3462 leaves us with 94.
Append the next digit (3) from the dividend to 94 and continue with: 943 / 421

Advancing to step 7:
If we divide 943 by 421, we get 2 and a remainder of 101.
Put 2 as the next digit of the answer. 
Result so far: 9482.0
Subtract 842 from 943 to get 101.
Include the next digit (1) from the dividend after 101, then repeat: 1011 / 421

Moving on to step 8:
421 goes into 1011 2 times with a remainder of 169.
Use 2 as the next digit of our solution. 
Result so far: 94822.0
Subtract 842 from 1011 to get 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

Going ahead to step 9:
421 can be fit into 1690 4 times, resulting in a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 94822.4
If we take 1684 away from 1690, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 10:
421 goes into 60 0 times with a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 94822.4
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 11:
421 goes into 600 1 times with a remainder of 179.
The number 1 becomes the next digit in our result. 
Result so far: 94822.401
If we take 421 away from 600, we end up with 179.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1790, and continue the process.

Advancing to step 12:
421 goes into 1790 4 times with a remainder of 106.
The next digit of our result is 4. 
Result so far: 94822.4014
The remainder is 106 after subtracting 1684 from 1790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Step 13:
421 goes into 1060 2 times with a remainder of 218.
The next digit of our result is 2. 
Result so far: 94822.40142
The remainder is 218 after subtracting 842 from 1060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Let's proceed to step 14:
When dividing 2180 by 421, we get 5 with a remainder of 75.
Use 5 as the next digit of our solution. 
Result so far: 94822.401425
If we subtract 2105 from 2180, we get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 15:
If we divide 750 by 421, we get 1 and a remainder of 329.
Write down 1 as next digit of the result. 
Result so far: 94822.4014251
Subtracting 421 from 750 leaves us with 329.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3290, and continue the process.

Step 16:
421 can be fit into 3290 7 times, resulting in a remainder of 343.
The number 7 becomes the next digit in our result. 
Result so far: 94822.40142517
Subtract 2947 from 3290 to get 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

Our division results in 94822.40142517 with a remaining 3.43e-07.