66553967 divided by 261 
The aim is to understand the frequency of 261 in 66553967.

Going ahead to step 1:
6 divided by 261 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 261

On to step 2:
The number 261 fits into 66 0 times, leaving a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Bring next digit (5) of the dividend behind the 66 and repeat the process: 665 / 261

Advancing to step 3:
261 can be fit into 665 2 times, resulting in a remainder of 143.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 522 from 665, we get 143.
Grab the next digit (5) from the dividend, add it to 143, then carry on: 1435 / 261

On to step 4:
When dividing 1435 by 261, we get 5 with a remainder of 130.
Write down 5 as next digit of the result. 
Result so far: 25.0
If we subtract 1305 from 1435, we get 130.
Append the next digit (3) from the dividend to 130 and continue with: 1303 / 261

Step 5:
261 goes into 1303 4 times with a remainder of 259.
Record the quotient 4 as the next digit in the result. 
Result so far: 254.0
Deduct 1044 from 1303 and we're left with 259.
Grab the next digit (9) from the dividend, add it to 259, then carry on: 2599 / 261

Step 6:
The number 261 fits into 2599 9 times, leaving a remainder of 250.
Put 9 as the next digit of the answer. 
Result so far: 2549.0
If we take 2349 away from 2599, we end up with 250.
Take the next digit (6) from the dividend and append it to 250, then repeat: 2506 / 261

Going ahead to step 7:
The number 261 fits into 2506 9 times, leaving a remainder of 157.
The next digit of our result is 9. 
Result so far: 25499.0
If we take 2349 away from 2506, we end up with 157.
Include the next digit (7) from the dividend after 157, then repeat: 1577 / 261

Going ahead to step 8:
261 goes into 1577 6 times with a remainder of 11.
Write down 6 as next digit of the result. 
Result so far: 254996.0
Subtract 1566 from 1577 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 9:
110 divided by 261 is 0 with a remainder of 110.
Write down 0 as next digit of the result. 
Result so far: 254996.0
If we take 0 away from 110, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Moving on to step 10:
If we divide 1100 by 261, we get 4 and a remainder of 56.
Record the quotient 4 as the next digit in the result. 
Result so far: 254996.04
If we subtract 1044 from 1100, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 11:
560 divided by 261 is 2 with a remainder of 38.
Put 2 as the next digit of the answer. 
Result so far: 254996.042
If we take 522 away from 560, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 12:
When dividing 380 by 261, we get 1 with a remainder of 119.
Record the quotient 1 as the next digit in the result. 
Result so far: 254996.0421
Subtract 261 from 380 to get 119.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Going ahead to step 13:
When dividing 1190 by 261, we get 4 with a remainder of 146.
Use 4 as the next digit of our solution. 
Result so far: 254996.04214
If we subtract 1044 from 1190, we get 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Moving on to step 14:
261 can be fit into 1460 5 times, resulting in a remainder of 155.
The number 5 becomes the next digit in our result. 
Result so far: 254996.042145
Subtract 1305 from 1460 to get 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

On to step 15:
The number 261 fits into 1550 5 times, leaving a remainder of 245.
Use 5 as the next digit of our solution. 
Result so far: 254996.0421455
Subtract 1305 from 1550 to get 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

The final result is 254996.0421455 with a remainder of 2.45e-06.