We're dividing 87621807 by 489 
We want to divide 87621807 by 489.

Going ahead to step 1:
When dividing 8 by 489, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 489

On to step 2:
The number 489 fits into 87 0 times, leaving a remainder of 87.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 87 and we're left with 87.
Bring next digit (6) of the dividend behind the 87 and repeat the process: 876 / 489

Let's proceed to step 3:
876 divided by 489 is 1 with a remainder of 387.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 489 from 876 and we're left with 387.
Grab the next digit (2) from the dividend, add it to 387, then carry on: 3872 / 489

Let's proceed to step 4:
When dividing 3872 by 489, we get 7 with a remainder of 449.
The next digit of our result is 7. 
Result so far: 17.0
Subtracting 3423 from 3872 leaves us with 449.
Append the next digit (1) from the dividend to 449 and continue with: 4491 / 489

Moving on to step 5:
When dividing 4491 by 489, we get 9 with a remainder of 90.
Record the quotient 9 as the next digit in the result. 
Result so far: 179.0
The remainder is 90 after subtracting 4401 from 4491.
Grab the next digit (8) from the dividend, add it to 90, then carry on: 908 / 489

Step 6:
489 goes into 908 1 times with a remainder of 419.
Put 1 as the next digit of the answer. 
Result so far: 1791.0
Subtracting 489 from 908 leaves us with 419.
Include the next digit (0) from the dividend after 419, then repeat: 4190 / 489

Moving on to step 7:
4190 divided by 489 is 8 with a remainder of 278.
Use 8 as the next digit of our solution. 
Result so far: 17918.0
Subtract 3912 from 4190 to get 278.
Fetch the next digit (7) from the dividend, attach it to 278 and continue: 2787 / 489

Let's proceed to step 8:
If we divide 2787 by 489, we get 5 and a remainder of 342.
Write down 5 as next digit of the result. 
Result so far: 179185.0
Deduct 2445 from 2787 and we're left with 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Let's proceed to step 9:
489 can be fit into 3420 6 times, resulting in a remainder of 486.
Use 6 as the next digit of our solution. 
Result so far: 179185.6
The remainder is 486 after subtracting 2934 from 3420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4860, and continue the process.

On to step 10:
If we divide 4860 by 489, we get 9 and a remainder of 459.
Record the quotient 9 as the next digit in the result. 
Result so far: 179185.69
The remainder is 459 after subtracting 4401 from 4860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4590, and continue the process.

Advancing to step 11:
489 can be fit into 4590 9 times, resulting in a remainder of 189.
Use 9 as the next digit of our solution. 
Result so far: 179185.699
Subtracting 4401 from 4590 leaves us with 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

The final outcome is 179185.699, with a leftover of 0.0189.