We divide 402126 by 39
We're looking to find how many times 39 goes into 402126.

Advancing to step 1:
If we divide 4 by 39, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 39

On to step 2:
39 goes into 40 1 times with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 39 away from 40, we end up with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 39

Advancing to step 3:
When dividing 12 by 39, we get 0 with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we take 0 away from 12, we end up with 12.
Grab the next digit (1) from the dividend, add it to 12, then carry on: 121 / 39

Moving on to step 4:
39 can be fit into 121 3 times, resulting in a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 103.0
Subtracting 117 from 121 leaves us with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 39

Step 5:
39 can be fit into 42 1 times, resulting in a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 1031.0
Subtracting 39 from 42 leaves us with 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 39

On to step 6:
39 goes into 36 0 times with a remainder of 36.
Write down 0 as next digit of the result. 
Result so far: 10310.0
If we subtract 0 from 36, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 7:
If we divide 360 by 39, we get 9 and a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 10310.9
If we subtract 351 from 360, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 8:
When dividing 90 by 39, we get 2 with a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 10310.92
Subtract 78 from 90 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 9:
When dividing 120 by 39, we get 3 with a remainder of 3.
The next digit of our result is 3. 
Result so far: 10310.923
If we subtract 117 from 120, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 10:
When dividing 30 by 39, we get 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 10310.923
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 11:
The number 39 fits into 300 7 times, leaving a remainder of 27.
The number 7 becomes the next digit in our result. 
Result so far: 10310.92307
The remainder is 27 after subtracting 273 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 12:
39 can be fit into 270 6 times, resulting in a remainder of 36.
Put 6 as the next digit of the answer. 
Result so far: 10310.923076
Deduct 234 from 270 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 13:
39 can be fit into 360 9 times, resulting in a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 10310.9230769
The remainder is 9 after subtracting 351 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 14:
If we divide 90 by 39, we get 2 and a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 10310.92307692
Deduct 78 from 90 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 10310.92307692 with a remaining 1.2e-08.