We're dividing 251130 by 21 
Let's see how many times 21 fits into 251130.

Let's proceed to step 1:
21 can be fit into 2 0 times, resulting in a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 21

Moving on to step 2:
When dividing 25 by 21, we get 1 with a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 21 from 25 leaves us with 4.
Include the next digit (1) from the dividend after 4, then repeat: 41 / 21

Moving on to step 3:
21 goes into 41 1 times with a remainder of 20.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we take 21 away from 41, we end up with 20.
Bring next digit (1) of the dividend behind the 20 and repeat the process: 201 / 21

Moving on to step 4:
21 goes into 201 9 times with a remainder of 12.
Use 9 as the next digit of our solution. 
Result so far: 119.0
The remainder is 12 after subtracting 189 from 201.
Grab the next digit (3) from the dividend, add it to 12, then carry on: 123 / 21

Advancing to step 5:
21 goes into 123 5 times with a remainder of 18.
The next digit of our result is 5. 
Result so far: 1195.0
If we take 105 away from 123, we end up with 18.
Append the next digit (0) from the dividend to 18 and continue with: 180 / 21

On to step 6:
21 goes into 180 8 times with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 11958.0
Subtracting 168 from 180 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 7:
When dividing 120 by 21, we get 5 with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 11958.5
The remainder is 15 after subtracting 105 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 8:
21 goes into 150 7 times with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 11958.57
If we take 147 away from 150, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 9:
30 divided by 21 is 1 with a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 11958.571
The remainder is 9 after subtracting 21 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 10:
21 can be fit into 90 4 times, resulting in a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 11958.5714
If we subtract 84 from 90, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 11:
If we divide 60 by 21, we get 2 and a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 11958.57142
The remainder is 18 after subtracting 42 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 12:
180 divided by 21 is 8 with a remainder of 12.
The next digit of our result is 8. 
Result so far: 11958.571428
Subtracting 168 from 180 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 13:
The number 21 fits into 120 5 times, leaving a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 11958.5714285
Deduct 105 from 120 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 14:
21 goes into 150 7 times with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 11958.57142857
Subtracting 147 from 150 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

After the division, we end up with 11958.57142857 and a remainder of 3e-09.