51238423 divided by 851 
Our goal is to divide 51238423 by 851.

Going ahead to step 1:
The number 851 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 851

Going ahead to step 2:
When dividing 51 by 851, we get 0 with a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Take the next digit (2) from the dividend and append it to 51, then repeat: 512 / 851

Let's proceed to step 3:
851 can be fit into 512 0 times, resulting in a remainder of 512.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 512, we get 512.
Append the next digit (3) from the dividend to 512 and continue with: 5123 / 851

Let's proceed to step 4:
When dividing 5123 by 851, we get 6 with a remainder of 17.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
The remainder is 17 after subtracting 5106 from 5123.
Grab the next digit (8) from the dividend, add it to 17, then carry on: 178 / 851

On to step 5:
851 can be fit into 178 0 times, resulting in a remainder of 178.
Use 0 as the next digit of our solution. 
Result so far: 60.0
Deduct 0 from 178 and we're left with 178.
Take the next digit (4) from the dividend and append it to 178, then repeat: 1784 / 851

On to step 6:
When dividing 1784 by 851, we get 2 with a remainder of 82.
Use 2 as the next digit of our solution. 
Result so far: 602.0
If we subtract 1702 from 1784, we get 82.
Bring next digit (2) of the dividend behind the 82 and repeat the process: 822 / 851

Step 7:
851 goes into 822 0 times with a remainder of 822.
The next digit of our result is 0. 
Result so far: 6020.0
The remainder is 822 after subtracting 0 from 822.
Fetch the next digit (3) from the dividend, attach it to 822 and continue: 8223 / 851

Let's proceed to step 8:
The number 851 fits into 8223 9 times, leaving a remainder of 564.
Record the quotient 9 as the next digit in the result. 
Result so far: 60209.0
The remainder is 564 after subtracting 7659 from 8223.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5640, and continue the process.

Step 9:
The number 851 fits into 5640 6 times, leaving a remainder of 534.
Put 6 as the next digit of the answer. 
Result so far: 60209.6
Subtract 5106 from 5640 to get 534.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5340, and continue the process.

Let's proceed to step 10:
851 goes into 5340 6 times with a remainder of 234.
The next digit of our result is 6. 
Result so far: 60209.66
Deduct 5106 from 5340 and we're left with 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Our division results in 60209.66 with a remaining 0.234.