620397 divided by 51 
We want to divide 620397 by 51.

Step 1:
51 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (2) from the dividend and append it to 6, then repeat: 62 / 51

Advancing to step 2:
51 can be fit into 62 1 times, resulting in a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 51 away from 62, we end up with 11.
Bring next digit (0) of the dividend behind the 11 and repeat the process: 110 / 51

On to step 3:
If we divide 110 by 51, we get 2 and a remainder of 8.
The next digit of our result is 2. 
Result so far: 12.0
Subtract 102 from 110 to get 8.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 51

Step 4:
51 goes into 83 1 times with a remainder of 32.
The next digit of our result is 1. 
Result so far: 121.0
If we subtract 51 from 83, we get 32.
Include the next digit (9) from the dividend after 32, then repeat: 329 / 51

Step 5:
51 can be fit into 329 6 times, resulting in a remainder of 23.
Put 6 as the next digit of the answer. 
Result so far: 1216.0
If we subtract 306 from 329, we get 23.
Append the next digit (7) from the dividend to 23 and continue with: 237 / 51

Let's proceed to step 6:
The number 51 fits into 237 4 times, leaving a remainder of 33.
Record the quotient 4 as the next digit in the result. 
Result so far: 12164.0
If we subtract 204 from 237, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Going ahead to step 7:
51 goes into 330 6 times with a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 12164.6
Subtracting 306 from 330 leaves us 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:
The number 51 fits into 240 4 times, leaving a remainder of 36.
The next digit of our result is 4. 
Result so far: 12164.64
Subtracting 204 from 240 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 9:
51 goes into 360 7 times with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 12164.647
Subtract 357 from 360 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 10:
When dividing 30 by 51, we get 0 with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 12164.647
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 11:
51 can be fit into 300 5 times, resulting in a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 12164.64705
Subtract 255 from 300 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 12:
If we divide 450 by 51, we get 8 and a remainder of 42.
Put 8 as the next digit of the answer. 
Result so far: 12164.647058
Deduct 408 from 450 and we're left 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 13:
The number 51 fits into 420 8 times, leaving a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 12164.6470588
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.

The final result is 12164.6470588 with a remainder of 1.2e-07.