We're dividing 15016378 by 399 
We want to figure out the number of times 15016378 can be divided by 399.

Advancing to step 1:
399 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 399

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
If we take 0 away from 15, we end up with 15.
Take the next digit (0) from the dividend and append it to 15, then repeat: 150 / 399

Going ahead to step 3:
If we divide 150 by 399, we get 0 and a remainder of 150.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 150 after subtracting 0 from 150.
Include the next digit (1) from the dividend after 150, then repeat: 1501 / 399

Advancing to step 4:
When dividing 1501 by 399, we get 3 with a remainder of 304.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 1197 away from 1501, we end up with 304.
Fetch the next digit (6) from the dividend, attach it to 304 and continue: 3046 / 399

Going ahead to step 5:
The number 399 fits into 3046 7 times, leaving a remainder of 253.
Write down 7 as next digit of the result. 
Result so far: 37.0
Deduct 2793 from 3046 and we're left with 253.
Bring next digit (3) of the dividend behind the 253 and repeat the process: 2533 / 399

Let's proceed to step 6:
If we divide 2533 by 399, we get 6 and a remainder of 139.
Use 6 as the next digit of our solution. 
Result so far: 376.0
If we take 2394 away from 2533, we end up with 139.
Include the next digit (7) from the dividend after 139, then repeat: 1397 / 399

Moving on to step 7:
If we divide 1397 by 399, we get 3 and a remainder of 200.
Write down 3 as next digit of the result. 
Result so far: 3763.0
If we take 1197 away from 1397, we end up with 200.
Bring next digit (8) of the dividend behind the 200 and repeat the process: 2008 / 399

Advancing to step 8:
When dividing 2008 by 399, we get 5 with a remainder of 13.
Put 5 as the next digit of the answer. 
Result so far: 37635.0
The remainder is 13 after subtracting 1995 from 2008.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 9:
130 divided by 399 is 0 with a remainder of 130.
Write down 0 as next digit of the result. 
Result so far: 37635.0
If we take 0 away from 130, we end up with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Advancing to step 10:
399 goes into 1300 3 times with a remainder of 103.
Record the quotient 3 as the next digit in the result. 
Result so far: 37635.03
If we take 1197 away from 1300, we end up with 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Moving on to step 11:
When dividing 1030 by 399, we get 2 with a remainder of 232.
Use 2 as the next digit of our solution. 
Result so far: 37635.032
The remainder is 232 after subtracting 798 from 1030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

On to step 12:
399 can be fit into 2320 5 times, resulting in a remainder of 325.
Record the quotient 5 as the next digit in the result. 
Result so far: 37635.0325
Deduct 1995 from 2320 and we're left with 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Step 13:
If we divide 3250 by 399, we get 8 and a remainder of 58.
Put 8 as the next digit of the answer. 
Result so far: 37635.03258
The remainder is 58 after subtracting 3192 from 3250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 14:
580 divided by 399 is 1 with a remainder of 181.
Record the quotient 1 as the next digit in the result. 
Result so far: 37635.032581
Deduct 399 from 580 and we're left with 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Moving on to step 15:
When dividing 1810 by 399, we get 4 with a remainder of 214.
The number 4 becomes the next digit in our result. 
Result so far: 37635.0325814
The remainder is 214 after subtracting 1596 from 1810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

On to step 16:
2140 divided by 399 is 5 with a remainder of 145.
Write down 5 as next digit of the result. 
Result so far: 37635.03258145
If we subtract 1995 from 2140, we get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

After the division, we end up with 37635.03258145 and a remainder of 1.45e-07.