We're dividing 8037458 by 400 
The aim is to understand the frequency of 400 in 8037458.

Moving on to step 1:
The number 400 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 400

Moving on to step 2:
400 goes into 80 0 times with a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 80, we end up with 80.
Bring next digit (3) of the dividend behind the 80 and repeat the process: 803 / 400

Going ahead to step 3:
The number 400 fits into 803 2 times, leaving a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 800 from 803, we get 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 400

Moving on to step 4:
37 divided by 400 is 0 with a remainder of 37.
Put 0 as the next digit of the answer. 
Result so far: 20.0
If we take 0 away from 37, we end up with 37.
Bring next digit (4) of the dividend behind the 37 and repeat the process: 374 / 400

On to step 5:
374 divided by 400 is 0 with a remainder of 374.
The next digit of our result is 0. 
Result so far: 200.0
Deduct 0 from 374 and we're left with 374.
Fetch the next digit (5) from the dividend, attach it to 374 and continue: 3745 / 400

Moving on to step 6:
When dividing 3745 by 400, we get 9 with a remainder of 145.
The next digit of our result is 9. 
Result so far: 2009.0
The remainder is 145 after subtracting 3600 from 3745.
Fetch the next digit (8) from the dividend, attach it to 145 and continue: 1458 / 400

Step 7:
400 goes into 1458 3 times with a remainder of 258.
Record the quotient 3 as the next digit in the result. 
Result so far: 20093.0
If we take 1200 away from 1458, we end up with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Going ahead to step 8:
400 can be fit into 2580 6 times, resulting in a remainder of 180.
The number 6 becomes the next digit in our result. 
Result so far: 20093.6
Subtract 2400 from 2580 to get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

On to step 9:
The number 400 fits into 1800 4 times, leaving a remainder of 200.
Use 4 as the next digit of our solution. 
Result so far: 20093.64
Subtracting 1600 from 1800 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Step 10:
400 can be fit into 2000 5 times, resulting in a remainder of 0.
The next digit of our result is 5. 
Result so far: 20093.645
Deduct 2000 from 2000 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.

Moving on to step 11:
If we divide 0 by 400, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 20093.645
Subtracting 0 from 0 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.

Let's proceed to step 12:
The number 400 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 20093.645
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 20093.645, and the remainder is 0.0.