We look at the division of 51135616 by 621 
Our goal is to divide 51135616 by 621.

On to step 1:
If we divide 5 by 621, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 621

Going ahead to step 2:
51 divided by 621 is 0 with a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Append the next digit (1) from the dividend to 51 and continue with: 511 / 621

Step 3:
621 can be fit into 511 0 times, resulting in a remainder of 511.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 511, we end up with 511.
Include the next digit (3) from the dividend after 511, then repeat: 5113 / 621

Moving on to step 4:
When dividing 5113 by 621, we get 8 with a remainder of 145.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 145 after subtracting 4968 from 5113.
Bring next digit (5) of the dividend behind the 145 and repeat the process: 1455 / 621

Let's proceed to step 5:
When dividing 1455 by 621, we get 2 with a remainder of 213.
Record the quotient 2 as the next digit in the result. 
Result so far: 82.0
Deduct 1242 from 1455 and we're left with 213.
Fetch the next digit (6) from the dividend, attach it to 213 and continue: 2136 / 621

Step 6:
2136 divided by 621 is 3 with a remainder of 273.
The number 3 becomes the next digit in our result. 
Result so far: 823.0
Subtract 1863 from 2136 to get 273.
Grab the next digit (1) from the dividend, add it to 273, then carry on: 2731 / 621

Let's proceed to step 7:
621 can be fit into 2731 4 times, resulting in a remainder of 247.
Record the quotient 4 as the next digit in the result. 
Result so far: 8234.0
Subtracting 2484 from 2731 leaves us with 247.
Fetch the next digit (6) from the dividend, attach it to 247 and continue: 2476 / 621

On to step 8:
2476 divided by 621 is 3 with a remainder of 613.
Use 3 as the next digit of our solution. 
Result so far: 82343.0
The remainder is 613 after subtracting 1863 from 2476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6130, and continue the process.

Moving on to step 9:
6130 divided by 621 is 9 with a remainder of 541.
Put 9 as the next digit of the answer. 
Result so far: 82343.9
The remainder is 541 after subtracting 5589 from 6130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5410, and continue the process.

Let's proceed to step 10:
If we divide 5410 by 621, we get 8 and a remainder of 442.
The next digit of our result is 8. 
Result so far: 82343.98
If we subtract 4968 from 5410, we get 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

On to step 11:
If we divide 4420 by 621, we get 7 and a remainder of 73.
Put 7 as the next digit of the answer. 
Result so far: 82343.987
The remainder is 73 after subtracting 4347 from 4420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Moving on to step 12:
The number 621 fits into 730 1 times, leaving a remainder of 109.
Put 1 as the next digit of the answer. 
Result so far: 82343.9871
If we subtract 621 from 730, we get 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Advancing to step 13:
When dividing 1090 by 621, we get 1 with a remainder of 469.
Record the quotient 1 as the next digit in the result. 
Result so far: 82343.98711
Subtract 621 from 1090 to get 469.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4690, and continue the process.

The quotient of the division is 82343.98711, and the remainder is 0.000469.