64821785 divided by 851 
Our goal is to divide 64821785 by 851.

Step 1:
851 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the 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 / 851

On to step 2:
64 divided by 851 is 0 with a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Include the next digit (8) from the dividend after 64, then repeat: 648 / 851

On to step 3:
When dividing 648 by 851, we get 0 with a remainder of 648.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 648, we end up with 648.
Append the next digit (2) from the dividend to 648 and continue with: 6482 / 851

Moving on to step 4:
851 can be fit into 6482 7 times, resulting in a remainder of 525.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we subtract 5957 from 6482, we get 525.
Fetch the next digit (1) from the dividend, attach it to 525 and continue: 5251 / 851

On to step 5:
5251 divided by 851 is 6 with a remainder of 145.
The number 6 becomes the next digit in our result. 
Result so far: 76.0
If we take 5106 away from 5251, we end up with 145.
Fetch the next digit (7) from the dividend, attach it to 145 and continue: 1457 / 851

Advancing to step 6:
If we divide 1457 by 851, we get 1 and a remainder of 606.
The number 1 becomes the next digit in our result. 
Result so far: 761.0
If we subtract 851 from 1457, we get 606.
Bring next digit (8) of the dividend behind the 606 and repeat the process: 6068 / 851

Step 7:
When dividing 6068 by 851, we get 7 with a remainder of 111.
Put 7 as the next digit of the answer. 
Result so far: 7617.0
Deduct 5957 from 6068 and we're left with 111.
Bring next digit (5) of the dividend behind the 111 and repeat the process: 1115 / 851

Let's proceed to step 8:
1115 divided by 851 is 1 with a remainder of 264.
Record the quotient 1 as the next digit in the result. 
Result so far: 76171.0
If we subtract 851 from 1115, we get 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Advancing to step 9:
The number 851 fits into 2640 3 times, leaving a remainder of 87.
Record the quotient 3 as the next digit in the result. 
Result so far: 76171.3
Subtracting 2553 from 2640 leaves us with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Going ahead to step 10:
870 divided by 851 is 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 76171.31
If we subtract 851 from 870, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 11:
If we divide 190 by 851, we get 0 and a remainder of 190.
Put 0 as the next digit of the answer. 
Result so far: 76171.31
Deduct 0 from 190 and we're left with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Going ahead to step 12:
1900 divided by 851 is 2 with a remainder of 198.
The number 2 becomes the next digit in our result. 
Result so far: 76171.3102
Deduct 1702 from 1900 and we're left with 198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

Moving on to step 13:
When dividing 1980 by 851, we get 2 with a remainder of 278.
Use 2 as the next digit of our solution. 
Result so far: 76171.31022
Subtracting 1702 from 1980 leaves us with 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

The final outcome is 76171.31022, with a leftover of 0.000278.