We look at the division of 13388760 by 399 
We want to figure out the number of times 13388760 can be divided by 399.

Moving on to step 1:
1 divided by 399 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 399

On to step 2:
399 goes into 13 0 times with a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 13, we get 13.
Fetch the next digit (3) from the dividend, attach it to 13 and continue: 133 / 399

Going ahead to step 3:
If we divide 133 by 399, we get 0 and a remainder of 133.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 133 after subtracting 0 from 133.
Bring next digit (8) of the dividend behind the 133 and repeat the process: 1338 / 399

On to step 4:
If we divide 1338 by 399, we get 3 and a remainder of 141.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 141 after subtracting 1197 from 1338.
Take the next digit (8) from the dividend and append it to 141, then repeat: 1418 / 399

Advancing to step 5:
When dividing 1418 by 399, we get 3 with a remainder of 221.
Put 3 as the next digit of the answer. 
Result so far: 33.0
If we subtract 1197 from 1418, we get 221.
Take the next digit (7) from the dividend and append it to 221, then repeat: 2217 / 399

On to step 6:
If we divide 2217 by 399, we get 5 and a remainder of 222.
Put 5 as the next digit of the answer. 
Result so far: 335.0
Subtracting 1995 from 2217 leaves us with 222.
Include the next digit (6) from the dividend after 222, then repeat: 2226 / 399

Let's proceed to step 7:
399 goes into 2226 5 times with a remainder of 231.
Write down 5 as next digit of the result. 
Result so far: 3355.0
Deduct 1995 from 2226 and we're left with 231.
Fetch the next digit (0) from the dividend, attach it to 231 and continue: 2310 / 399

Let's proceed to step 8:
399 can be fit into 2310 5 times, resulting in a remainder of 315.
Record the quotient 5 as the next digit in the result. 
Result so far: 33555.0
Deduct 1995 from 2310 and we're left with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Let's proceed to step 9:
3150 divided by 399 is 7 with a remainder of 357.
Put 7 as the next digit of the answer. 
Result so far: 33555.7
Deduct 2793 from 3150 and we're left with 357.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3570, and continue the process.

Let's proceed to step 10:
When dividing 3570 by 399, we get 8 with a remainder of 378.
Use 8 as the next digit of our solution. 
Result so far: 33555.78
If we take 3192 away from 3570, we end up with 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

Going ahead to step 11:
When dividing 3780 by 399, we get 9 with a remainder of 189.
The next digit of our result is 9. 
Result so far: 33555.789
If we subtract 3591 from 3780, we get 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

On to step 12:
When dividing 1890 by 399, we get 4 with a remainder of 294.
The next digit of our result is 4. 
Result so far: 33555.7894
The remainder is 294 after subtracting 1596 from 1890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Moving on to step 13:
2940 divided by 399 is 7 with a remainder of 147.
The number 7 becomes the next digit in our result. 
Result so far: 33555.78947
Subtracting 2793 from 2940 leaves us with 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

Advancing to step 14:
399 can be fit into 1470 3 times, resulting in a remainder of 273.
Record the quotient 3 as the next digit in the result. 
Result so far: 33555.789473
Subtract 1197 from 1470 to get 273.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2730, and continue the process.

Advancing to step 15:
If we divide 2730 by 399, we get 6 and a remainder of 336.
The number 6 becomes the next digit in our result. 
Result so far: 33555.7894736
Subtract 2394 from 2730 to get 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Advancing to step 16:
3360 divided by 399 is 8 with a remainder of 168.
The next digit of our result is 8. 
Result so far: 33555.78947368
Deduct 3192 from 3360 and we're left with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

In conclusion, the division gives 33555.78947368 with a balance of 1.68e-07.