We look at the division of 821390 by 51 
Our goal is to divide 821390 by 51.

Step 1:
When dividing 8 by 51, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (2) from the dividend, add it to 8, then carry on: 82 / 51

Going ahead to step 2:
The number 51 fits into 82 1 times, leaving a remainder of 31.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 51 away from 82, we end up with 31.
Bring next digit (1) of the dividend behind the 31 and repeat the process: 311 / 51

Going ahead to step 3:
If we divide 311 by 51, we get 6 and a remainder of 5.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
The remainder is 5 after subtracting 306 from 311.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 51

Let's proceed to step 4:
51 can be fit into 53 1 times, resulting in a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 161.0
Subtracting 51 from 53 leaves us with 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 51

Let's proceed to step 5:
The number 51 fits into 29 0 times, leaving a remainder of 29.
The next digit of our result is 0. 
Result so far: 1610.0
Subtract 0 from 29 to get 29.
Grab the next digit (0) from the dividend, add it to 29, then carry on: 290 / 51

Advancing to step 6:
The number 51 fits into 290 5 times, leaving a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 16105.0
If we take 255 away from 290, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 7:
51 goes into 350 6 times with a remainder of 44.
Write down 6 as next digit of the result. 
Result so far: 16105.6
Subtract 306 from 350 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 8:
51 can be fit into 440 8 times, resulting in a remainder of 32.
The next digit of our result is 8. 
Result so far: 16105.68
If we subtract 408 from 440, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 9:
51 goes into 320 6 times with a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 16105.686
If we subtract 306 from 320, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 10:
When dividing 140 by 51, we get 2 with a remainder of 38.
Record the quotient 2 as the next digit in the result. 
Result so far: 16105.6862
If we take 102 away from 140, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 11:
When dividing 380 by 51, we get 7 with a remainder of 23.
Record the quotient 7 as the next digit in the result. 
Result so far: 16105.68627
The remainder is 23 after subtracting 357 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 12:
51 goes into 230 4 times with a remainder of 26.
Use 4 as the next digit of our solution. 
Result so far: 16105.686274
If we take 204 away from 230, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 13:
260 divided by 51 is 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 16105.6862745
Deduct 255 from 260 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 14:
51 can be fit into 50 0 times, resulting in a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 16105.6862745
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final outcome is 16105.6862745, with a leftover of 5e-08.