We look at the division of 20718751 by 851 
We're looking to find how many times 851 goes into 20718751.

On to step 1:
When dividing 2 by 851, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 851

Advancing to step 2:
851 goes into 20 0 times with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 20 leaves us with 20.
Grab the next digit (7) from the dividend, add it to 20, then carry on: 207 / 851

Let's proceed to step 3:
When dividing 207 by 851, we get 0 with a remainder of 207.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 207, we end up with 207.
Take the next digit (1) from the dividend and append it to 207, then repeat: 2071 / 851

Advancing to step 4:
If we divide 2071 by 851, we get 2 and a remainder of 369.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 1702 from 2071 to get 369.
Include the next digit (8) from the dividend after 369, then repeat: 3698 / 851

Advancing to step 5:
When dividing 3698 by 851, we get 4 with a remainder of 294.
Record the quotient 4 as the next digit in the result. 
Result so far: 24.0
Subtracting 3404 from 3698 leaves us with 294.
Bring next digit (7) of the dividend behind the 294 and repeat the process: 2947 / 851

Moving on to step 6:
851 goes into 2947 3 times with a remainder of 394.
Record the quotient 3 as the next digit in the result. 
Result so far: 243.0
The remainder is 394 after subtracting 2553 from 2947.
Fetch the next digit (5) from the dividend, attach it to 394 and continue: 3945 / 851

Advancing to step 7:
When dividing 3945 by 851, we get 4 with a remainder of 541.
Write down 4 as next digit of the result. 
Result so far: 2434.0
Deduct 3404 from 3945 and we're left with 541.
Take the next digit (1) from the dividend and append it to 541, then repeat: 5411 / 851

Going ahead to step 8:
851 goes into 5411 6 times with a remainder of 305.
The number 6 becomes the next digit in our result. 
Result so far: 24346.0
If we take 5106 away from 5411, we end up with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Let's proceed to step 9:
3050 divided by 851 is 3 with a remainder of 497.
The number 3 becomes the next digit in our result. 
Result so far: 24346.3
If we take 2553 away from 3050, we end up with 497.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4970, and continue the process.

Going ahead to step 10:
4970 divided by 851 is 5 with a remainder of 715.
The number 5 becomes the next digit in our result. 
Result so far: 24346.35
Subtract 4255 from 4970 to get 715.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7150, and continue the process.

On to step 11:
7150 divided by 851 is 8 with a remainder of 342.
Put 8 as the next digit of the answer. 
Result so far: 24346.358
Subtracting 6808 from 7150 leaves us with 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Advancing to step 12:
If we divide 3420 by 851, we get 4 and a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 24346.3584
Deduct 3404 from 3420 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 13:
160 divided by 851 is 0 with a remainder of 160.
The number 0 becomes the next digit in our result. 
Result so far: 24346.3584
Deduct 0 from 160 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Going ahead to step 14:
When dividing 1600 by 851, we get 1 with a remainder of 749.
Record the quotient 1 as the next digit in the result. 
Result so far: 24346.358401
Subtract 851 from 1600 to get 749.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7490, and continue the process.

Advancing to step 15:
The number 851 fits into 7490 8 times, leaving a remainder of 682.
Write down 8 as next digit of the result. 
Result so far: 24346.3584018
If we subtract 6808 from 7490, we get 682.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6820, and continue the process.

Step 16:
When dividing 6820 by 851, we get 8 with a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 24346.35840188
If we take 6808 away from 6820, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 24346.35840188 with a remaining 1.2e-08.