We look at the division of 21122154 by 251 
We want to divide 21122154 by 251.

Let's proceed to step 1:
251 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 251

Moving on to step 2:
251 goes into 21 0 times with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Include the next digit (1) from the dividend after 21, then repeat: 211 / 251

Going ahead to step 3:
The number 251 fits into 211 0 times, leaving a remainder of 211.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 211 after subtracting 0 from 211.
Include the next digit (2) from the dividend after 211, then repeat: 2112 / 251

Advancing to step 4:
251 can be fit into 2112 8 times, resulting in a remainder of 104.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 2008 from 2112, we get 104.
Bring next digit (2) of the dividend behind the 104 and repeat the process: 1042 / 251

Let's proceed to step 5:
251 goes into 1042 4 times with a remainder of 38.
Write down 4 as next digit of the result. 
Result so far: 84.0
Subtracting 1004 from 1042 leaves us with 38.
Fetch the next digit (1) from the dividend, attach it to 38 and continue: 381 / 251

On to step 6:
The number 251 fits into 381 1 times, leaving a remainder of 130.
The number 1 becomes the next digit in our result. 
Result so far: 841.0
Subtracting 251 from 381 leaves us with 130.
Take the next digit (5) from the dividend and append it to 130, then repeat: 1305 / 251

Moving on to step 7:
The number 251 fits into 1305 5 times, leaving a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 8415.0
Subtract 1255 from 1305 to get 50.
Include the next digit (4) from the dividend after 50, then repeat: 504 / 251

Let's proceed to step 8:
251 can be fit into 504 2 times, resulting in a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 84152.0
Subtracting 502 from 504 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 9:
251 can be fit into 20 0 times, resulting in a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 84152.0
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 10:
When dividing 200 by 251, we get 0 with a remainder of 200.
The next digit of our result is 0. 
Result so far: 84152.0
Subtracting 0 from 200 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The quotient of the division is 84152.0, and the remainder is 0.2.