10486486 ÷ 66 
The aim is to understand the frequency of 66 in 10486486.

On to step 1:
66 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 66

Going ahead to step 2:
The number 66 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 10 and we're left with 10.
Include the next digit (4) from the dividend after 10, then repeat: 104 / 66

Let's proceed to step 3:
If we divide 104 by 66, we get 1 and a remainder of 38.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 66 from 104, we get 38.
Append the next digit (8) from the dividend to 38 and continue with: 388 / 66

Let's proceed to step 4:
If we divide 388 by 66, we get 5 and a remainder of 58.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Deduct 330 from 388 and we're left with 58.
Append the next digit (6) from the dividend to 58 and continue with: 586 / 66

Moving on to step 5:
586 divided by 66 is 8 with a remainder of 58.
Write down 8 as next digit of the result. 
Result so far: 158.0
If we subtract 528 from 586, we get 58.
Append the next digit (4) from the dividend to 58 and continue with: 584 / 66

Step 6:
584 divided by 66 is 8 with a remainder of 56.
Record the quotient 8 as the next digit in the result. 
Result so far: 1588.0
The remainder is 56 after subtracting 528 from 584.
Fetch the next digit (8) from the dividend, attach it to 56 and continue: 568 / 66

On to step 7:
The number 66 fits into 568 8 times, leaving a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 15888.0
The remainder is 40 after subtracting 528 from 568.
Take the next digit (6) from the dividend and append it to 40, then repeat: 406 / 66

Step 8:
The number 66 fits into 406 6 times, leaving a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 158886.0
Subtract 396 from 406 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
66 can be fit into 100 1 times, resulting in a remainder of 34.
Put 1 as the next digit of the answer. 
Result so far: 158886.1
The remainder is 34 after subtracting 66 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 10:
66 goes into 340 5 times with a remainder of 10.
The next digit of our result is 5. 
Result so far: 158886.15
If we subtract 330 from 340, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 11:
66 goes into 100 1 times with a remainder of 34.
Put 1 as the next digit of the answer. 
Result so far: 158886.151
Deduct 66 from 100 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 12:
66 goes into 340 5 times with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 158886.1515
If we take 330 away from 340, 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.

Let's proceed to step 13:
The number 66 fits into 100 1 times, leaving a remainder of 34.
Use 1 as the next digit of our solution. 
Result so far: 158886.15151
Deduct 66 from 100 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 14:
The number 66 fits into 340 5 times, leaving a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 158886.151515
Deduct 330 from 340 and we're left 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.

On to step 15:
When dividing 100 by 66, we get 1 with a remainder of 34.
Use 1 as the next digit of our solution. 
Result so far: 158886.1515151
If we subtract 66 from 100, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 16:
66 can be fit into 340 5 times, resulting in a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 158886.15151515
If we take 330 away from 340, 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.

Our division results in 158886.15151515 with a remaining 1e-08.