We're dividing 21261222 by 637 
We want to divide 21261222 by 637.

Step 1:
The number 637 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 637

Step 2:
If we divide 21 by 637, we get 0 and a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Fetch the next digit (2) from the dividend, attach it to 21 and continue: 212 / 637

Step 3:
637 goes into 212 0 times with a remainder of 212.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 212, we get 212.
Fetch the next digit (6) from the dividend, attach it to 212 and continue: 2126 / 637

On to step 4:
The number 637 fits into 2126 3 times, leaving a remainder of 215.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 1911 from 2126 and we're left with 215.
Include the next digit (1) from the dividend after 215, then repeat: 2151 / 637

Moving on to step 5:
If we divide 2151 by 637, we get 3 and a remainder of 240.
Put 3 as the next digit of the answer. 
Result so far: 33.0
Subtracting 1911 from 2151 leaves us with 240.
Append the next digit (2) from the dividend to 240 and continue with: 2402 / 637

Let's proceed to step 6:
2402 divided by 637 is 3 with a remainder of 491.
Write down 3 as next digit of the result. 
Result so far: 333.0
Subtract 1911 from 2402 to get 491.
Take the next digit (2) from the dividend and append it to 491, then repeat: 4912 / 637

Step 7:
When dividing 4912 by 637, we get 7 with a remainder of 453.
The number 7 becomes the next digit in our result. 
Result so far: 3337.0
If we take 4459 away from 4912, we end up with 453.
Include the next digit (2) from the dividend after 453, then repeat: 4532 / 637

Advancing to step 8:
637 goes into 4532 7 times with a remainder of 73.
Record the quotient 7 as the next digit in the result. 
Result so far: 33377.0
If we subtract 4459 from 4532, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Let's proceed to step 9:
When dividing 730 by 637, we get 1 with a remainder of 93.
The number 1 becomes the next digit in our result. 
Result so far: 33377.1
If we take 637 away from 730, we end up with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

On to step 10:
If we divide 930 by 637, we get 1 and a remainder of 293.
The next digit of our result is 1. 
Result so far: 33377.11
The remainder is 293 after subtracting 637 from 930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2930, and continue the process.

Our division results in 33377.11 with a remaining 0.293.