We look at the division of 18745357 by 621 
We want to divide 18745357 by 621.

Step 1:
621 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 621

Moving on to step 2:
621 goes into 18 0 times with a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 18, we end up with 18.
Include the next digit (7) from the dividend after 18, then repeat: 187 / 621

Going ahead to step 3:
The number 621 fits into 187 0 times, leaving a remainder of 187.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 187, we get 187.
Include the next digit (4) from the dividend after 187, then repeat: 1874 / 621

Going ahead to step 4:
1874 divided by 621 is 3 with a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 1863 from 1874, we get 11.
Grab the next digit (5) from the dividend, add it to 11, then carry on: 115 / 621

Step 5:
The number 621 fits into 115 0 times, leaving a remainder of 115.
Put 0 as the next digit of the answer. 
Result so far: 30.0
The remainder is 115 after subtracting 0 from 115.
Grab the next digit (3) from the dividend, add it to 115, then carry on: 1153 / 621

Let's proceed to step 6:
621 goes into 1153 1 times with a remainder of 532.
Record the quotient 1 as the next digit in the result. 
Result so far: 301.0
If we take 621 away from 1153, we end up with 532.
Grab the next digit (5) from the dividend, add it to 532, then carry on: 5325 / 621

Let's proceed to step 7:
5325 divided by 621 is 8 with a remainder of 357.
The number 8 becomes the next digit in our result. 
Result so far: 3018.0
Subtracting 4968 from 5325 leaves us with 357.
Append the next digit (7) from the dividend to 357 and continue with: 3577 / 621

Moving on to step 8:
When dividing 3577 by 621, we get 5 with a remainder of 472.
Write down 5 as next digit of the result. 
Result so far: 30185.0
The remainder is 472 after subtracting 3105 from 3577.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Moving on to step 9:
If we divide 4720 by 621, we get 7 and a remainder of 373.
Use 7 as the next digit of our solution. 
Result so far: 30185.7
If we subtract 4347 from 4720, we get 373.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

Let's proceed to step 10:
621 goes into 3730 6 times with a remainder of 4.
The next digit of our result is 6. 
Result so far: 30185.76
The remainder is 4 after subtracting 3726 from 3730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 11:
40 divided by 621 is 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 30185.76
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 12:
When dividing 400 by 621, we get 0 with a remainder of 400.
The next digit of our result is 0. 
Result so far: 30185.76
The remainder is 400 after subtracting 0 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final result is 30185.76 with a remainder of 0.004.