Let's divide 381556 by 21
Our goal is to divide 381556 by 21.

Step 1:
When dividing 3 by 21, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 21

Step 2:
21 goes into 38 1 times with a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 21 away from 38, we end up with 17.
Take the next digit (1) from the dividend and append it to 17, then repeat: 171 / 21

On to step 3:
If we divide 171 by 21, we get 8 and a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
Deduct 168 from 171 and we're left with 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 21

Going ahead to step 4:
35 divided by 21 is 1 with a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 181.0
Subtracting 21 from 35 leaves us with 14.
Bring next digit (5) of the dividend behind the 14 and repeat the process: 145 / 21

On to step 5:
145 divided by 21 is 6 with a remainder of 19.
Write down 6 as next digit of the result. 
Result so far: 1816.0
Subtract 126 from 145 to get 19.
Bring next digit (6) of the dividend behind the 19 and repeat the process: 196 / 21

On to step 6:
21 goes into 196 9 times with a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 18169.0
Subtract 189 from 196 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 7:
The number 21 fits into 70 3 times, leaving a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 18169.3
If we subtract 63 from 70, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 8:
When dividing 70 by 21, we get 3 with a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 18169.33
If we subtract 63 from 70, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Our division results in 18169.33 with a remaining 0.007.