54210201 ÷ 400 
We're looking to find how many times 400 goes into 54210201.

Moving on to step 1:
5 divided by 400 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (4) from the dividend after 5, then repeat: 54 / 400

Let's proceed to step 2:
If we divide 54 by 400, we get 0 and a remainder of 54.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 54 and we're left with 54.
Include the next digit (2) from the dividend after 54, then repeat: 542 / 400

Let's proceed to step 3:
400 can be fit into 542 1 times, resulting in a remainder of 142.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 400 from 542 and we're left with 142.
Grab the next digit (1) from the dividend, add it to 142, then carry on: 1421 / 400

Step 4:
When dividing 1421 by 400, we get 3 with a remainder of 221.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Deduct 1200 from 1421 and we're left with 221.
Fetch the next digit (0) from the dividend, attach it to 221 and continue: 2210 / 400

On to step 5:
If we divide 2210 by 400, we get 5 and a remainder of 210.
Record the quotient 5 as the next digit in the result. 
Result so far: 135.0
The remainder is 210 after subtracting 2000 from 2210.
Append the next digit (2) from the dividend to 210 and continue with: 2102 / 400

Let's proceed to step 6:
If we divide 2102 by 400, we get 5 and a remainder of 102.
Write down 5 as next digit of the result. 
Result so far: 1355.0
Subtract 2000 from 2102 to get 102.
Grab the next digit (0) from the dividend, add it to 102, then carry on: 1020 / 400

On to step 7:
400 goes into 1020 2 times with a remainder of 220.
Record the quotient 2 as the next digit in the result. 
Result so far: 13552.0
Subtract 800 from 1020 to get 220.
Append the next digit (1) from the dividend to 220 and continue with: 2201 / 400

Moving on to step 8:
If we divide 2201 by 400, we get 5 and a remainder of 201.
Put 5 as the next digit of the answer. 
Result so far: 135525.0
Subtracting 2000 from 2201 leaves us with 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

Advancing to step 9:
If we divide 2010 by 400, we get 5 and a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 135525.5
If we take 2000 away from 2010, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 10:
If we divide 100 by 400, we get 0 and a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 135525.5
If we take 0 away from 100, we end up with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 11:
If we divide 1000 by 400, we get 2 and a remainder of 200.
The number 2 becomes the next digit in our result. 
Result so far: 135525.502
The remainder is 200 after subtracting 800 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 12:
If we divide 2000 by 400, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 135525.5025
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.

Advancing to step 13:
When dividing 0 by 400, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 135525.5025
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 14:
400 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 135525.5025
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.

The quotient of the division is 135525.5025, and the remainder is 0.0.