We're dividing 51243 by 51 
Let's see how many times 51 fits into 51243.

Moving on to step 1:
51 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 51

Step 2:
51 divided by 51 is 1 with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 51 from 51 to get 0.
Take the next digit (2) from the dividend and append it to 0, then repeat: 2 / 51

Step 3:
51 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 51

Advancing to step 4:
51 goes into 24 0 times with a remainder of 24.
Write down 0 as next digit of the result. 
Result so far: 100.0
Subtract 0 from 24 to get 24.
Grab the next digit (3) from the dividend, add it to 24, then carry on: 243 / 51

On to step 5:
When dividing 243 by 51, we get 4 with a remainder of 39.
Record the quotient 4 as the next digit in the result. 
Result so far: 1004.0
If we take 204 away from 243, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 6:
When dividing 390 by 51, we get 7 with a remainder of 33.
Use 7 as the next digit of our solution. 
Result so far: 1004.7
Deduct 357 from 390 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 7:
51 can be fit into 330 6 times, resulting in a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 1004.76
Deduct 306 from 330 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 8:
If we divide 240 by 51, we get 4 and a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 1004.764
Subtract 204 from 240 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 9:
360 divided by 51 is 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 1004.7647
If we take 357 away from 360, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 10:
The number 51 fits into 30 0 times, leaving a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 1004.7647
Deduct 0 from 30 and we're left with 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 11:
51 can be fit into 300 5 times, resulting in a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 1004.764705
Subtracting 255 from 300 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 12:
450 divided by 51 is 8 with a remainder of 42.
Put 8 as the next digit of the answer. 
Result so far: 1004.7647058
Subtracting 408 from 450 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 13:
If we divide 420 by 51, we get 8 and a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 1004.76470588
If we subtract 408 from 420, we 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.

The final outcome is 1004.76470588, with a leftover of 1.2e-08.