We're dividing 869645 by 66 
We're looking to find how many times 66 goes into 869645.

On to step 1:
66 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 66

Going ahead to step 2:
66 goes into 86 1 times with a remainder of 20.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 66 from 86 to get 20.
Fetch the next digit (9) from the dividend, attach it to 20 and continue: 209 / 66

Moving on to step 3:
209 divided by 66 is 3 with a remainder of 11.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we subtract 198 from 209, we get 11.
Grab the next digit (6) from the dividend, add it to 11, then carry on: 116 / 66

Going ahead to step 4:
When dividing 116 by 66, we get 1 with a remainder of 50.
Write down 1 as next digit of the result. 
Result so far: 131.0
Deduct 66 from 116 and we're left with 50.
Take the next digit (4) from the dividend and append it to 50, then repeat: 504 / 66

Advancing to step 5:
If we divide 504 by 66, we get 7 and a remainder of 42.
Write down 7 as next digit of the result. 
Result so far: 1317.0
Subtract 462 from 504 to get 42.
Take the next digit (5) from the dividend and append it to 42, then repeat: 425 / 66

Step 6:
The number 66 fits into 425 6 times, leaving a remainder of 29.
The number 6 becomes the next digit in our result. 
Result so far: 13176.0
Subtract 396 from 425 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 7:
290 divided by 66 is 4 with a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 13176.4
Deduct 264 from 290 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 8:
66 can be fit into 260 3 times, resulting in a remainder of 62.
Record the quotient 3 as the next digit in the result. 
Result so far: 13176.43
Subtracting 198 from 260 leaves us with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 9:
If we divide 620 by 66, we get 9 and a remainder of 26.
The number 9 becomes the next digit in our result. 
Result so far: 13176.439
If we subtract 594 from 620, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 10:
66 goes into 260 3 times with a remainder of 62.
Put 3 as the next digit of the answer. 
Result so far: 13176.4393
Subtracting 198 from 260 leaves us with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Let's proceed to step 11:
The number 66 fits into 620 9 times, leaving a remainder of 26.
The number 9 becomes the next digit in our result. 
Result so far: 13176.43939
The remainder is 26 after subtracting 594 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 12:
66 can be fit into 260 3 times, resulting in a remainder of 62.
The number 3 becomes the next digit in our result. 
Result so far: 13176.439393
If we subtract 198 from 260, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 13:
The number 66 fits into 620 9 times, leaving a remainder of 26.
The next digit of our result is 9. 
Result so far: 13176.4393939
Deduct 594 from 620 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 14:
66 can be fit into 260 3 times, resulting in a remainder of 62.
The next digit of our result is 3. 
Result so far: 13176.43939393
If we subtract 198 from 260, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Our division results in 13176.43939393 with a remaining 6.2e-08.