813750 ÷ 51 
Let's see how many times 51 fits into 813750.

Advancing to step 1:
If we divide 8 by 51, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 51

Going ahead to step 2:
If we divide 81 by 51, we get 1 and a remainder of 30.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 51 from 81 leaves us with 30.
Grab the next digit (3) from the dividend, add it to 30, then carry on: 303 / 51

Going ahead to step 3:
The number 51 fits into 303 5 times, leaving a remainder of 48.
Write down 5 as next digit of the result. 
Result so far: 15.0
Subtract 255 from 303 to get 48.
Bring next digit (7) of the dividend behind the 48 and repeat the process: 487 / 51

Step 4:
If we divide 487 by 51, we get 9 and a remainder of 28.
Put 9 as the next digit of the answer. 
Result so far: 159.0
The remainder is 28 after subtracting 459 from 487.
Grab the next digit (5) from the dividend, add it to 28, then carry on: 285 / 51

Moving on to step 5:
285 divided by 51 is 5 with a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 1595.0
Deduct 255 from 285 and we're left with 30.
Bring next digit (0) of the dividend behind the 30 and repeat the process: 300 / 51

Let's proceed to step 6:
When dividing 300 by 51, we get 5 with a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 15955.0
The remainder is 45 after subtracting 255 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 7:
The number 51 fits into 450 8 times, leaving a remainder of 42.
The next digit of our result is 8. 
Result so far: 15955.8
If we take 408 away from 450, we end up 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.

Going ahead to step 8:
51 goes into 420 8 times with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 15955.88
Subtracting 408 from 420 leaves us 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.

After the division, we end up with 15955.88 and a remainder of 0.012.