54242216 ÷ 400 
The aim is to understand the frequency of 400 in 54242216.

On to step 1:
If we divide 5 by 400, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 400

Moving on to step 2:
If we divide 54 by 400, we get 0 and a remainder of 54.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 54, we end up with 54.
Bring next digit (2) of the dividend behind the 54 and repeat the process: 542 / 400

Step 3:
The number 400 fits into 542 1 times, leaving a remainder of 142.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 400 from 542 leaves us with 142.
Append the next digit (4) from the dividend to 142 and continue with: 1424 / 400

Let's proceed to step 4:
400 goes into 1424 3 times with a remainder of 224.
The next digit of our result is 3. 
Result so far: 13.0
If we subtract 1200 from 1424, we get 224.
Take the next digit (2) from the dividend and append it to 224, then repeat: 2242 / 400

Let's proceed to step 5:
The number 400 fits into 2242 5 times, leaving a remainder of 242.
The next digit of our result is 5. 
Result so far: 135.0
The remainder is 242 after subtracting 2000 from 2242.
Grab the next digit (2) from the dividend, add it to 242, then carry on: 2422 / 400

Step 6:
When dividing 2422 by 400, we get 6 with a remainder of 22.
Use 6 as the next digit of our solution. 
Result so far: 1356.0
Subtracting 2400 from 2422 leaves us with 22.
Take the next digit (1) from the dividend and append it to 22, then repeat: 221 / 400

Let's proceed to step 7:
221 divided by 400 is 0 with a remainder of 221.
Put 0 as the next digit of the answer. 
Result so far: 13560.0
If we subtract 0 from 221, we get 221.
Bring next digit (6) of the dividend behind the 221 and repeat the process: 2216 / 400

On to step 8:
400 can be fit into 2216 5 times, resulting in a remainder of 216.
Use 5 as the next digit of our solution. 
Result so far: 135605.0
The remainder is 216 after subtracting 2000 from 2216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Moving on to step 9:
If we divide 2160 by 400, we get 5 and a remainder of 160.
Use 5 as the next digit of our solution. 
Result so far: 135605.5
If we take 2000 away from 2160, we end up with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 10:
1600 divided by 400 is 4 with a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 135605.54
Subtracting 1600 from 1600 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.

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: 135605.54
If we take 0 away from 0, we end up 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.

Going ahead to step 12:
When dividing 0 by 400, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 135605.54
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.

Our division results in 135605.54 with a remaining 0.0.