We're dividing 620349 by 51 
Our goal is to divide 620349 by 51.

Going ahead to step 1:
51 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
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

Let's proceed to step 2:
51 goes into 62 1 times with a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 51 from 62 to get 11.
Grab the next digit (0) from the dividend, add it to 11, then carry on: 110 / 51

Let's proceed to step 3:
If we divide 110 by 51, we get 2 and a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Deduct 102 from 110 and we're left with 8.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 51

On to step 4:
The number 51 fits into 83 1 times, leaving a remainder of 32.
Write down 1 as next digit of the result. 
Result so far: 121.0
Subtract 51 from 83 to get 32.
Append the next digit (4) from the dividend to 32 and continue with: 324 / 51

Moving on to step 5:
324 divided by 51 is 6 with a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 1216.0
If we subtract 306 from 324, we get 18.
Grab the next digit (9) from the dividend, add it to 18, then carry on: 189 / 51

On to step 6:
If we divide 189 by 51, we get 3 and a remainder of 36.
Record the quotient 3 as the next digit in the result. 
Result so far: 12163.0
Subtract 153 from 189 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.

Step 7:
360 divided by 51 is 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 12163.7
Subtracting 357 from 360 leaves us 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.

Let's proceed to step 8:
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: 12163.7
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.

Going ahead to step 9:
The number 51 fits into 300 5 times, leaving a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 12163.705
Deduct 255 from 300 and we're left 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.

Going ahead to step 10:
When dividing 450 by 51, we get 8 with a remainder of 42.
Record the quotient 8 as the next digit in the result. 
Result so far: 12163.7058
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.

On to step 11:
51 can be fit into 420 8 times, resulting in a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 12163.70588
Subtract 408 from 420 to 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.

After the division, we end up with 12163.70588 and a remainder of 1.2e-05.