We look at the division of 53507269 by 621 
Our goal is to divide 53507269 by 621.

Moving on to step 1:
The number 621 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 621

Moving on to step 2:
53 divided by 621 is 0 with a remainder of 53.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 53 to get 53.
Bring next digit (5) of the dividend behind the 53 and repeat the process: 535 / 621

Moving on to step 3:
621 can be fit into 535 0 times, resulting in a remainder of 535.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 535, we get 535.
Bring next digit (0) of the dividend behind the 535 and repeat the process: 5350 / 621

Moving on to step 4:
When dividing 5350 by 621, we get 8 with a remainder of 382.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we subtract 4968 from 5350, we get 382.
Append the next digit (7) from the dividend to 382 and continue with: 3827 / 621

Step 5:
When dividing 3827 by 621, we get 6 with a remainder of 101.
Use 6 as the next digit of our solution. 
Result so far: 86.0
Subtract 3726 from 3827 to get 101.
Fetch the next digit (2) from the dividend, attach it to 101 and continue: 1012 / 621

Moving on to step 6:
1012 divided by 621 is 1 with a remainder of 391.
Write down 1 as next digit of the result. 
Result so far: 861.0
Deduct 621 from 1012 and we're left with 391.
Include the next digit (6) from the dividend after 391, then repeat: 3916 / 621

Step 7:
621 goes into 3916 6 times with a remainder of 190.
Write down 6 as next digit of the result. 
Result so far: 8616.0
Subtract 3726 from 3916 to get 190.
Bring next digit (9) of the dividend behind the 190 and repeat the process: 1909 / 621

Let's proceed to step 8:
When dividing 1909 by 621, we get 3 with a remainder of 46.
Use 3 as the next digit of our solution. 
Result so far: 86163.0
If we subtract 1863 from 1909, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 9:
460 divided by 621 is 0 with a remainder of 460.
Use 0 as the next digit of our solution. 
Result so far: 86163.0
If we subtract 0 from 460, we get 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Going ahead to step 10:
621 can be fit into 4600 7 times, resulting in a remainder of 253.
The next digit of our result is 7. 
Result so far: 86163.07
Subtract 4347 from 4600 to get 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

Going ahead to step 11:
2530 divided by 621 is 4 with a remainder of 46.
The next digit of our result is 4. 
Result so far: 86163.074
If we take 2484 away from 2530, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 12:
When dividing 460 by 621, we get 0 with a remainder of 460.
The number 0 becomes the next digit in our result. 
Result so far: 86163.074
If we take 0 away from 460, we end up with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Let's proceed to step 13:
621 goes into 4600 7 times with a remainder of 253.
Put 7 as the next digit of the answer. 
Result so far: 86163.07407
Deduct 4347 from 4600 and we're left with 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

Step 14:
If we divide 2530 by 621, we get 4 and a remainder of 46.
The next digit of our result is 4. 
Result so far: 86163.074074
If we subtract 2484 from 2530, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 15:
621 goes into 460 0 times with a remainder of 460.
Write down 0 as next digit of the result. 
Result so far: 86163.074074
Subtract 0 from 460 to get 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Moving on to step 16:
If we divide 4600 by 621, we get 7 and a remainder of 253.
Record the quotient 7 as the next digit in the result. 
Result so far: 86163.07407407
Subtract 4347 from 4600 to get 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

The final result is 86163.07407407 with a remainder of 2.53e-07.