15134531 divided by 399 
We're looking to find how many times 399 goes into 15134531.

Let's proceed to step 1:
If we divide 1 by 399, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 399

Moving on to step 2:
15 divided by 399 is 0 with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 399

Going ahead to step 3:
If we divide 151 by 399, we get 0 and a remainder of 151.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 151, we end up with 151.
Include the next digit (3) from the dividend after 151, then repeat: 1513 / 399

Step 4:
1513 divided by 399 is 3 with a remainder of 316.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 1197 from 1513, we get 316.
Bring next digit (4) of the dividend behind the 316 and repeat the process: 3164 / 399

On to step 5:
399 can be fit into 3164 7 times, resulting in a remainder of 371.
Record the quotient 7 as the next digit in the result. 
Result so far: 37.0
If we subtract 2793 from 3164, we get 371.
Take the next digit (5) from the dividend and append it to 371, then repeat: 3715 / 399

Step 6:
3715 divided by 399 is 9 with a remainder of 124.
Record the quotient 9 as the next digit in the result. 
Result so far: 379.0
If we subtract 3591 from 3715, we get 124.
Fetch the next digit (3) from the dividend, attach it to 124 and continue: 1243 / 399

Moving on to step 7:
When dividing 1243 by 399, we get 3 with a remainder of 46.
Use 3 as the next digit of our solution. 
Result so far: 3793.0
Deduct 1197 from 1243 and we're left with 46.
Bring next digit (1) of the dividend behind the 46 and repeat the process: 461 / 399

Let's proceed to step 8:
The number 399 fits into 461 1 times, leaving a remainder of 62.
Write down 1 as next digit of the result. 
Result so far: 37931.0
Subtracting 399 from 461 leaves us with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Going ahead to step 9:
399 can be fit into 620 1 times, resulting in a remainder of 221.
Use 1 as the next digit of our solution. 
Result so far: 37931.1
Deduct 399 from 620 and we're left with 221.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

Moving on to step 10:
When dividing 2210 by 399, we get 5 with a remainder of 215.
Write down 5 as next digit of the result. 
Result so far: 37931.15
Subtract 1995 from 2210 to get 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Let's proceed to step 11:
399 can be fit into 2150 5 times, resulting in a remainder of 155.
The number 5 becomes the next digit in our result. 
Result so far: 37931.155
If we subtract 1995 from 2150, we get 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

The final result is 37931.155 with a remainder of 0.0155.