We're dividing 15174012 by 400 
We want to figure out the number of times 15174012 can be divided by 400.

Moving on to step 1:
1 divided by 400 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.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 400

Advancing to step 2:
400 can be fit into 15 0 times, resulting in a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Grab the next digit (1) from the dividend, add it to 15, then carry on: 151 / 400

On to step 3:
400 can be fit into 151 0 times, resulting in a remainder of 151.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 151, we get 151.
Append the next digit (7) from the dividend to 151 and continue with: 1517 / 400

Going ahead to step 4:
400 goes into 1517 3 times with a remainder of 317.
The next digit of our result is 3. 
Result so far: 3.0
If we take 1200 away from 1517, we end up with 317.
Append the next digit (4) from the dividend to 317 and continue with: 3174 / 400

Moving on to step 5:
When dividing 3174 by 400, we get 7 with a remainder of 374.
Use 7 as the next digit of our solution. 
Result so far: 37.0
If we take 2800 away from 3174, we end up with 374.
Bring next digit (0) of the dividend behind the 374 and repeat the process: 3740 / 400

Step 6:
If we divide 3740 by 400, we get 9 and a remainder of 140.
The next digit of our result is 9. 
Result so far: 379.0
If we take 3600 away from 3740, we end up with 140.
Bring next digit (1) of the dividend behind the 140 and repeat the process: 1401 / 400

On to step 7:
The number 400 fits into 1401 3 times, leaving a remainder of 201.
Record the quotient 3 as the next digit in the result. 
Result so far: 3793.0
If we subtract 1200 from 1401, we get 201.
Include the next digit (2) from the dividend after 201, then repeat: 2012 / 400

Advancing to step 8:
If we divide 2012 by 400, we get 5 and a remainder of 12.
Use 5 as the next digit of our solution. 
Result so far: 37935.0
Subtracting 2000 from 2012 leaves us 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.

On to step 9:
400 goes into 120 0 times with a remainder of 120.
Write down 0 as next digit of the result. 
Result so far: 37935.0
If we take 0 away from 120, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 10:
If we divide 1200 by 400, we get 3 and a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 37935.03
Subtracting 1200 from 1200 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
0 divided by 400 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 37935.03
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 12:
The number 400 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 37935.03
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 37935.03, and the remainder is 0.0.