81542390 ÷ 224 
The aim is to understand the frequency of 224 in 81542390.

On to step 1:
When dividing 8 by 224, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 224

Advancing to step 2:
If we divide 81 by 224, we get 0 and a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Take the next digit (5) from the dividend and append it to 81, then repeat: 815 / 224

Advancing to step 3:
When dividing 815 by 224, we get 3 with a remainder of 143.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 672 from 815, we get 143.
Include the next digit (4) from the dividend after 143, then repeat: 1434 / 224

Moving on to step 4:
1434 divided by 224 is 6 with a remainder of 90.
Use 6 as the next digit of our solution. 
Result so far: 36.0
Subtracting 1344 from 1434 leaves us with 90.
Fetch the next digit (2) from the dividend, attach it to 90 and continue: 902 / 224

Step 5:
902 divided by 224 is 4 with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 364.0
Subtract 896 from 902 to get 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 224

Moving on to step 6:
224 can be fit into 63 0 times, resulting in a remainder of 63.
Use 0 as the next digit of our solution. 
Result so far: 3640.0
If we subtract 0 from 63, we get 63.
Take the next digit (9) from the dividend and append it to 63, then repeat: 639 / 224

Step 7:
The number 224 fits into 639 2 times, leaving a remainder of 191.
The number 2 becomes the next digit in our result. 
Result so far: 36402.0
Subtract 448 from 639 to get 191.
Grab the next digit (0) from the dividend, add it to 191, then carry on: 1910 / 224

Advancing to step 8:
If we divide 1910 by 224, we get 8 and a remainder of 118.
The number 8 becomes the next digit in our result. 
Result so far: 364028.0
If we subtract 1792 from 1910, we get 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

On to step 9:
224 goes into 1180 5 times with a remainder of 60.
Record the quotient 5 as the next digit in the result. 
Result so far: 364028.5
Deduct 1120 from 1180 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 10:
224 goes into 600 2 times with a remainder of 152.
The next digit of our result is 2. 
Result so far: 364028.52
The remainder is 152 after subtracting 448 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Going ahead to step 11:
When dividing 1520 by 224, we get 6 with a remainder of 176.
Write down 6 as next digit of the result. 
Result so far: 364028.526
The remainder is 176 after subtracting 1344 from 1520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Advancing to step 12:
224 goes into 1760 7 times with a remainder of 192.
Record the quotient 7 as the next digit in the result. 
Result so far: 364028.5267
Subtract 1568 from 1760 to get 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Going ahead to step 13:
224 goes into 1920 8 times with a remainder of 128.
Record the quotient 8 as the next digit in the result. 
Result so far: 364028.52678
The remainder is 128 after subtracting 1792 from 1920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Step 14:
The number 224 fits into 1280 5 times, leaving a remainder of 160.
The number 5 becomes the next digit in our result. 
Result so far: 364028.526785
If we take 1120 away from 1280, 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.

Going ahead to step 15:
1600 divided by 224 is 7 with a remainder of 32.
Record the quotient 7 as the next digit in the result. 
Result so far: 364028.5267857
Deduct 1568 from 1600 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 16:
224 can be fit into 320 1 times, resulting in a remainder of 96.
The next digit of our result is 1. 
Result so far: 364028.52678571
Subtract 224 from 320 to get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

The quotient of the division is 364028.52678571, and the remainder is 9.6e-08.