400657 ÷ 13 
Our goal is to divide 400657 by 13.

Let's proceed to step 1:
13 goes into 4 0 times with 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.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 13

Going ahead to step 2:
If we divide 40 by 13, we get 3 and a remainder of 1.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 39 from 40 to get 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 13

Step 3:
13 can be fit into 10 0 times, resulting in a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 30.0
Subtract 0 from 10 to get 10.
Grab the next digit (6) from the dividend, add it to 10, then carry on: 106 / 13

Let's proceed to step 4:
If we divide 106 by 13, we get 8 and a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 308.0
The remainder is 2 after subtracting 104 from 106.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 13

Let's proceed to step 5:
The number 13 fits into 25 1 times, leaving a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 3081.0
If we take 13 away from 25, we end up with 12.
Fetch the next digit (7) from the dividend, attach it to 12 and continue: 127 / 13

On to step 6:
If we divide 127 by 13, we get 9 and a remainder of 10.
Use 9 as the next digit of our solution. 
Result so far: 30819.0
The remainder is 10 after subtracting 117 from 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 7:
When dividing 100 by 13, we get 7 with a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 30819.7
Subtract 91 from 100 to 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.

On to step 8:
90 divided by 13 is 6 with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 30819.76
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.

Let's proceed to step 9:
13 goes into 120 9 times with a remainder of 3.
The next digit of our result is 9. 
Result so far: 30819.769
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:
13 can be fit into 30 2 times, resulting in a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 30819.7692
The remainder is 4 after subtracting 26 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 11:
When dividing 40 by 13, we get 3 with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 30819.76923
Subtract 39 from 40 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 12:
When dividing 10 by 13, we get 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 30819.76923
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 13:
13 goes into 100 7 times with a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 30819.7692307
Deduct 91 from 100 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 14:
13 goes into 90 6 times with a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 30819.76923076
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.

The final outcome is 30819.76923076, with a leftover of 1.2e-08.