We divide 71582290 by 221
The aim is to understand the frequency of 221 in 71582290.

Let's proceed to step 1:
221 goes into 7 0 times with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 221

Going ahead to step 2:
221 can be fit into 71 0 times, resulting in a remainder of 71.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 71, we get 71.
Include the next digit (5) from the dividend after 71, then repeat: 715 / 221

Step 3:
When dividing 715 by 221, we get 3 with a remainder of 52.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 52 after subtracting 663 from 715.
Fetch the next digit (8) from the dividend, attach it to 52 and continue: 528 / 221

Going ahead to step 4:
The number 221 fits into 528 2 times, leaving a remainder of 86.
Record the quotient 2 as the next digit in the result. 
Result so far: 32.0
Subtract 442 from 528 to get 86.
Include the next digit (2) from the dividend after 86, then repeat: 862 / 221

Moving on to step 5:
The number 221 fits into 862 3 times, leaving a remainder of 199.
Record the quotient 3 as the next digit in the result. 
Result so far: 323.0
Subtracting 663 from 862 leaves us with 199.
Grab the next digit (2) from the dividend, add it to 199, then carry on: 1992 / 221

On to step 6:
1992 divided by 221 is 9 with a remainder of 3.
Put 9 as the next digit of the answer. 
Result so far: 3239.0
If we subtract 1989 from 1992, we get 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 221

Going ahead to step 7:
221 goes into 39 0 times with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 32390.0
Deduct 0 from 39 and we're left with 39.
Take the next digit (0) from the dividend and append it to 39, then repeat: 390 / 221

Let's proceed to step 8:
221 goes into 390 1 times with a remainder of 169.
Record the quotient 1 as the next digit in the result. 
Result so far: 323901.0
If we subtract 221 from 390, we get 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

Let's proceed to step 9:
The number 221 fits into 1690 7 times, leaving a remainder of 143.
Use 7 as the next digit of our solution. 
Result so far: 323901.7
Subtracting 1547 from 1690 leaves us with 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

Moving on to step 10:
221 goes into 1430 6 times with a remainder of 104.
Record the quotient 6 as the next digit in the result. 
Result so far: 323901.76
Subtract 1326 from 1430 to get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Step 11:
1040 divided by 221 is 4 with a remainder of 156.
Put 4 as the next digit of the answer. 
Result so far: 323901.764
The remainder is 156 after subtracting 884 from 1040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Advancing to step 12:
1560 divided by 221 is 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 323901.7647
If we subtract 1547 from 1560, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 13:
221 goes into 130 0 times with a remainder of 130.
Write down 0 as next digit of the result. 
Result so far: 323901.7647
If we subtract 0 from 130, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Moving on to step 14:
If we divide 1300 by 221, we get 5 and a remainder of 195.
Use 5 as the next digit of our solution. 
Result so far: 323901.764705
The remainder is 195 after subtracting 1105 from 1300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Let's proceed to step 15:
The number 221 fits into 1950 8 times, leaving a remainder of 182.
The next digit of our result is 8. 
Result so far: 323901.7647058
Deduct 1768 from 1950 and we're left with 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Advancing to step 16:
If we divide 1820 by 221, we get 8 and a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 323901.76470588
Subtracting 1768 from 1820 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The final outcome is 323901.76470588, with a leftover of 5.2e-08.