89307388 ÷ 621 
Our goal is to divide 89307388 by 621.

Step 1:
8 divided by 621 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 621

Step 2:
621 goes into 89 0 times with a remainder of 89.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 89 and we're left with 89.
Grab the next digit (3) from the dividend, add it to 89, then carry on: 893 / 621

Moving on to step 3:
621 goes into 893 1 times with a remainder of 272.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 272 after subtracting 621 from 893.
Take the next digit (0) from the dividend and append it to 272, then repeat: 2720 / 621

On to step 4:
621 goes into 2720 4 times with a remainder of 236.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Deduct 2484 from 2720 and we're left with 236.
Bring next digit (7) of the dividend behind the 236 and repeat the process: 2367 / 621

Going ahead to step 5:
2367 divided by 621 is 3 with a remainder of 504.
The next digit of our result is 3. 
Result so far: 143.0
Subtract 1863 from 2367 to get 504.
Fetch the next digit (3) from the dividend, attach it to 504 and continue: 5043 / 621

Advancing to step 6:
621 goes into 5043 8 times with a remainder of 75.
The next digit of our result is 8. 
Result so far: 1438.0
Subtract 4968 from 5043 to get 75.
Take the next digit (8) from the dividend and append it to 75, then repeat: 758 / 621

Let's proceed to step 7:
621 goes into 758 1 times with a remainder of 137.
Use 1 as the next digit of our solution. 
Result so far: 14381.0
If we take 621 away from 758, we end up with 137.
Grab the next digit (8) from the dividend, add it to 137, then carry on: 1378 / 621

Advancing to step 8:
621 goes into 1378 2 times with a remainder of 136.
The number 2 becomes the next digit in our result. 
Result so far: 143812.0
If we subtract 1242 from 1378, we get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Let's proceed to step 9:
If we divide 1360 by 621, we get 2 and a remainder of 118.
The number 2 becomes the next digit in our result. 
Result so far: 143812.2
If we take 1242 away from 1360, we end up with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Moving on to step 10:
If we divide 1180 by 621, we get 1 and a remainder of 559.
The number 1 becomes the next digit in our result. 
Result so far: 143812.21
Subtracting 621 from 1180 leaves us with 559.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5590, and continue the process.

Let's proceed to step 11:
If we divide 5590 by 621, we get 9 and a remainder of 1.
The next digit of our result is 9. 
Result so far: 143812.219
If we take 5589 away from 5590, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 12:
If we divide 10 by 621, we get 0 and a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 143812.219
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 13:
621 goes into 100 0 times with a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 143812.219
Deduct 0 from 100 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final outcome is 143812.219, with a leftover of 0.0001.