3959988 ÷ 824 
Our goal is to divide 3959988 by 824.

Going ahead to step 1:
The number 824 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 824

On to step 2:
When dividing 39 by 824, we get 0 with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Fetch the next digit (5) from the dividend, attach it to 39 and continue: 395 / 824

On to step 3:
395 divided by 824 is 0 with a remainder of 395.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 395, we get 395.
Append the next digit (9) from the dividend to 395 and continue with: 3959 / 824

On to step 4:
824 can be fit into 3959 4 times, resulting in a remainder of 663.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 3296 from 3959 to get 663.
Take the next digit (9) from the dividend and append it to 663, then repeat: 6639 / 824

Step 5:
824 can be fit into 6639 8 times, resulting in a remainder of 47.
Record the quotient 8 as the next digit in the result. 
Result so far: 48.0
If we subtract 6592 from 6639, we get 47.
Take the next digit (8) from the dividend and append it to 47, then repeat: 478 / 824

Let's proceed to step 6:
824 goes into 478 0 times with a remainder of 478.
Put 0 as the next digit of the answer. 
Result so far: 480.0
Subtract 0 from 478 to get 478.
Append the next digit (8) from the dividend to 478 and continue with: 4788 / 824

Moving on to step 7:
If we divide 4788 by 824, we get 5 and a remainder of 668.
Write down 5 as next digit of the result. 
Result so far: 4805.0
Subtracting 4120 from 4788 leaves us with 668.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6680, and continue the process.

On to step 8:
If we divide 6680 by 824, we get 8 and a remainder of 88.
The next digit of our result is 8. 
Result so far: 4805.8
If we subtract 6592 from 6680, we get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Moving on to step 9:
824 can be fit into 880 1 times, resulting in a remainder of 56.
Record the quotient 1 as the next digit in the result. 
Result so far: 4805.81
Subtracting 824 from 880 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 10:
When dividing 560 by 824, we get 0 with a remainder of 560.
Put 0 as the next digit of the answer. 
Result so far: 4805.81
If we subtract 0 from 560, we get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Moving on to step 11:
824 can be fit into 5600 6 times, resulting in a remainder of 656.
Record the quotient 6 as the next digit in the result. 
Result so far: 4805.8106
If we take 4944 away from 5600, we end up with 656.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

Going ahead to step 12:
824 can be fit into 6560 7 times, resulting in a remainder of 792.
Use 7 as the next digit of our solution. 
Result so far: 4805.81067
If we subtract 5768 from 6560, we get 792.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7920, and continue the process.

Advancing to step 13:
7920 divided by 824 is 9 with a remainder of 504.
Write down 9 as next digit of the result. 
Result so far: 4805.810679
If we take 7416 away from 7920, we end up with 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

Step 14:
824 can be fit into 5040 6 times, resulting in a remainder of 96.
Record the quotient 6 as the next digit in the result. 
Result so far: 4805.8106796
If we take 4944 away from 5040, we end up with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Advancing to step 15:
When dividing 960 by 824, we get 1 with a remainder of 136.
The number 1 becomes the next digit in our result. 
Result so far: 4805.81067961
The remainder is 136 after subtracting 824 from 960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

The final result is 4805.81067961 with a remainder of 1.36e-07.