We divide 646469 by 86
We want to figure out the number of times 646469 can be divided by 86.

Going ahead to step 1:
6 divided by 86 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 86

Let's proceed to step 2:
If we divide 64 by 86, we get 0 and a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Fetch the next digit (6) from the dividend, attach it to 64 and continue: 646 / 86

Moving on to step 3:
When dividing 646 by 86, we get 7 with a remainder of 44.
The next digit of our result is 7. 
Result so far: 7.0
Subtracting 602 from 646 leaves us with 44.
Fetch the next digit (4) from the dividend, attach it to 44 and continue: 444 / 86

Advancing to step 4:
444 divided by 86 is 5 with a remainder of 14.
The next digit of our result is 5. 
Result so far: 75.0
The remainder is 14 after subtracting 430 from 444.
Take the next digit (6) from the dividend and append it to 14, then repeat: 146 / 86

Let's proceed to step 5:
The number 86 fits into 146 1 times, leaving a remainder of 60.
Put 1 as the next digit of the answer. 
Result so far: 751.0
If we subtract 86 from 146, we get 60.
Include the next digit (9) from the dividend after 60, then repeat: 609 / 86

On to step 6:
86 can be fit into 609 7 times, resulting in a remainder of 7.
Write down 7 as next digit of the result. 
Result so far: 7517.0
If we take 602 away from 609, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
The number 86 fits into 70 0 times, leaving a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 7517.0
If we take 0 away from 70, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 8:
The number 86 fits into 700 8 times, leaving a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 7517.08
Subtract 688 from 700 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 9:
When dividing 120 by 86, we get 1 with a remainder of 34.
Write down 1 as next digit of the result. 
Result so far: 7517.081
Subtracting 86 from 120 leaves us 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 10:
340 divided by 86 is 3 with a remainder of 82.
Record the quotient 3 as the next digit in the result. 
Result so far: 7517.0813
If we take 258 away from 340, we end up with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Let's proceed to step 11:
The number 86 fits into 820 9 times, leaving a remainder of 46.
The next digit of our result is 9. 
Result so far: 7517.08139
If we take 774 away from 820, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 12:
When dividing 460 by 86, we get 5 with a remainder of 30.
The next digit of our result is 5. 
Result so far: 7517.081395
If we subtract 430 from 460, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 13:
86 goes into 300 3 times with a remainder of 42.
Write down 3 as next digit of the result. 
Result so far: 7517.0813953
If we subtract 258 from 300, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 14:
The number 86 fits into 420 4 times, leaving a remainder of 76.
The next digit of our result is 4. 
Result so far: 7517.08139534
If we take 344 away from 420, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The final outcome is 7517.08139534, with a leftover of 7.6e-08.