84256789 divided by 66 
The aim is to understand the frequency of 66 in 84256789.

Step 1:
The number 66 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 66

On to step 2:
The number 66 fits into 84 1 times, leaving a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 66 from 84 leaves us with 18.
Grab the next digit (2) from the dividend, add it to 18, then carry on: 182 / 66

Advancing to step 3:
If we divide 182 by 66, we get 2 and a remainder of 50.
Write down 2 as next digit of the result. 
Result so far: 12.0
The remainder is 50 after subtracting 132 from 182.
Append the next digit (5) from the dividend to 50 and continue with: 505 / 66

Step 4:
505 divided by 66 is 7 with a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 127.0
Subtracting 462 from 505 leaves us with 43.
Fetch the next digit (6) from the dividend, attach it to 43 and continue: 436 / 66

Going ahead to step 5:
66 goes into 436 6 times with a remainder of 40.
Write down 6 as next digit of the result. 
Result so far: 1276.0
Subtract 396 from 436 to get 40.
Fetch the next digit (7) from the dividend, attach it to 40 and continue: 407 / 66

Going ahead to step 6:
If we divide 407 by 66, we get 6 and a remainder of 11.
The next digit of our result is 6. 
Result so far: 12766.0
Deduct 396 from 407 and we're left with 11.
Grab the next digit (8) from the dividend, add it to 11, then carry on: 118 / 66

Let's proceed to step 7:
When dividing 118 by 66, we get 1 with a remainder of 52.
Put 1 as the next digit of the answer. 
Result so far: 127661.0
Deduct 66 from 118 and we're left with 52.
Take the next digit (9) from the dividend and append it to 52, then repeat: 529 / 66

On to step 8:
When dividing 529 by 66, we get 8 with a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 1276618.0
If we take 528 away from 529, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 9:
10 divided by 66 is 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 1276618.0
If we subtract 0 from 10, 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 10:
100 divided by 66 is 1 with a remainder of 34.
Put 1 as the next digit of the answer. 
Result so far: 1276618.01
Subtract 66 from 100 to 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.

Advancing to step 11:
66 can be fit into 340 5 times, resulting in a remainder of 10.
The next digit of our result is 5. 
Result so far: 1276618.015
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.

Step 12:
If we divide 100 by 66, we get 1 and a remainder of 34.
Use 1 as the next digit of our solution. 
Result so far: 1276618.0151
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.

Advancing to step 13:
When dividing 340 by 66, we get 5 with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 1276618.01515
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.

Advancing to step 14:
66 goes into 100 1 times with a remainder of 34.
The next digit of our result is 1. 
Result so far: 1276618.015151
Subtract 66 from 100 to 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.

Going ahead to step 15:
66 can be fit into 340 5 times, resulting in a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 1276618.0151515
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.

On to step 16:
66 goes into 100 1 times with a remainder of 34.
Use 1 as the next digit of our solution. 
Result so far: 1276618.01515151
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.

The quotient of the division is 1276618.01515151, and the remainder is 3.4e-08.