64286643 divided by 815 
We want to divide 64286643 by 815.

On to step 1:
6 divided by 815 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 815

Going ahead to step 2:
If we divide 64 by 815, we get 0 and a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Bring next digit (2) of the dividend behind the 64 and repeat the process: 642 / 815

Step 3:
The number 815 fits into 642 0 times, leaving a remainder of 642.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 642 after subtracting 0 from 642.
Append the next digit (8) from the dividend to 642 and continue with: 6428 / 815

Let's proceed to step 4:
815 goes into 6428 7 times with a remainder of 723.
The next digit of our result is 7. 
Result so far: 7.0
Subtract 5705 from 6428 to get 723.
Append the next digit (6) from the dividend to 723 and continue with: 7236 / 815

Moving on to step 5:
7236 divided by 815 is 8 with a remainder of 716.
Write down 8 as next digit of the result. 
Result so far: 78.0
Subtracting 6520 from 7236 leaves us with 716.
Include the next digit (6) from the dividend after 716, then repeat: 7166 / 815

Moving on to step 6:
The number 815 fits into 7166 8 times, leaving a remainder of 646.
The next digit of our result is 8. 
Result so far: 788.0
Subtract 6520 from 7166 to get 646.
Grab the next digit (4) from the dividend, add it to 646, then carry on: 6464 / 815

Going ahead to step 7:
815 can be fit into 6464 7 times, resulting in a remainder of 759.
Write down 7 as next digit of the result. 
Result so far: 7887.0
If we take 5705 away from 6464, we end up with 759.
Take the next digit (3) from the dividend and append it to 759, then repeat: 7593 / 815

Let's proceed to step 8:
7593 divided by 815 is 9 with a remainder of 258.
The next digit of our result is 9. 
Result so far: 78879.0
Deduct 7335 from 7593 and we're left with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

On to step 9:
When dividing 2580 by 815, we get 3 with a remainder of 135.
The number 3 becomes the next digit in our result. 
Result so far: 78879.3
Subtracting 2445 from 2580 leaves us with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

On to step 10:
815 can be fit into 1350 1 times, resulting in a remainder of 535.
Write down 1 as next digit of the result. 
Result so far: 78879.31
Deduct 815 from 1350 and we're left with 535.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5350, and continue the process.

On to step 11:
815 goes into 5350 6 times with a remainder of 460.
Record the quotient 6 as the next digit in the result. 
Result so far: 78879.316
Subtracting 4890 from 5350 leaves us with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Step 12:
815 goes into 4600 5 times with a remainder of 525.
Write down 5 as next digit of the result. 
Result so far: 78879.3165
Deduct 4075 from 4600 and we're left with 525.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

On to step 13:
When dividing 5250 by 815, we get 6 with a remainder of 360.
Write down 6 as next digit of the result. 
Result so far: 78879.31656
Subtract 4890 from 5250 to get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Let's proceed to step 14:
815 goes into 3600 4 times with a remainder of 340.
The next digit of our result is 4. 
Result so far: 78879.316564
Subtracting 3260 from 3600 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Let's proceed to step 15:
When dividing 3400 by 815, we get 4 with a remainder of 140.
The next digit of our result is 4. 
Result so far: 78879.3165644
Deduct 3260 from 3400 and we're left with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

The final result is 78879.3165644 with a remainder of 1.4e-06.