We look at the division of 90531995 by 621 
Let's see how many times 621 fits into 90531995.

Moving on to step 1:
621 goes into 9 0 times with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 621

Step 2:
621 goes into 90 0 times with a remainder of 90.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 90 after subtracting 0 from 90.
Append the next digit (5) from the dividend to 90 and continue with: 905 / 621

Moving on to step 3:
621 can be fit into 905 1 times, resulting in a remainder of 284.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 621 from 905 and we're left with 284.
Bring next digit (3) of the dividend behind the 284 and repeat the process: 2843 / 621

Let's proceed to step 4:
If we divide 2843 by 621, we get 4 and a remainder of 359.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
Subtract 2484 from 2843 to get 359.
Append the next digit (1) from the dividend to 359 and continue with: 3591 / 621

On to step 5:
621 goes into 3591 5 times with a remainder of 486.
The next digit of our result is 5. 
Result so far: 145.0
If we take 3105 away from 3591, we end up with 486.
Fetch the next digit (9) from the dividend, attach it to 486 and continue: 4869 / 621

Moving on to step 6:
If we divide 4869 by 621, we get 7 and a remainder of 522.
The number 7 becomes the next digit in our result. 
Result so far: 1457.0
If we take 4347 away from 4869, we end up with 522.
Fetch the next digit (9) from the dividend, attach it to 522 and continue: 5229 / 621

Going ahead to step 7:
621 goes into 5229 8 times with a remainder of 261.
The number 8 becomes the next digit in our result. 
Result so far: 14578.0
Deduct 4968 from 5229 and we're left with 261.
Include the next digit (5) from the dividend after 261, then repeat: 2615 / 621

Going ahead to step 8:
2615 divided by 621 is 4 with a remainder of 131.
Record the quotient 4 as the next digit in the result. 
Result so far: 145784.0
If we subtract 2484 from 2615, we get 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Advancing to step 9:
If we divide 1310 by 621, we get 2 and a remainder of 68.
Record the quotient 2 as the next digit in the result. 
Result so far: 145784.2
Subtracting 1242 from 1310 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 10:
If we divide 680 by 621, we get 1 and a remainder of 59.
Put 1 as the next digit of the answer. 
Result so far: 145784.21
The remainder is 59 after subtracting 621 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 11:
When dividing 590 by 621, we get 0 with a remainder of 590.
Put 0 as the next digit of the answer. 
Result so far: 145784.21
Subtracting 0 from 590 leaves us with 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Going ahead to step 12:
5900 divided by 621 is 9 with a remainder of 311.
Use 9 as the next digit of our solution. 
Result so far: 145784.2109
If we take 5589 away from 5900, we end up with 311.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3110, and continue the process.

Going ahead to step 13:
621 can be fit into 3110 5 times, resulting in a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 145784.21095
If we subtract 3105 from 3110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 14:
621 can be fit into 50 0 times, resulting in a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 145784.21095
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.

Let's proceed to step 15:
When dividing 500 by 621, we get 0 with a remainder of 500.
Use 0 as the next digit of our solution. 
Result so far: 145784.21095
If we take 0 away from 500, we end up with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

After the division, we end up with 145784.21095 and a remainder of 5e-06.