We look at the division of 66221399 by 903 
Our goal is to divide 66221399 by 903.

Going ahead to step 1:
When dividing 6 by 903, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 903

Let's proceed to step 2:
903 can be fit into 66 0 times, resulting in a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Take the next digit (2) from the dividend and append it to 66, then repeat: 662 / 903

Step 3:
The number 903 fits into 662 0 times, leaving a remainder of 662.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 662 after subtracting 0 from 662.
Grab the next digit (2) from the dividend, add it to 662, then carry on: 6622 / 903

Moving on to step 4:
The number 903 fits into 6622 7 times, leaving a remainder of 301.
The next digit of our result is 7. 
Result so far: 7.0
The remainder is 301 after subtracting 6321 from 6622.
Take the next digit (1) from the dividend and append it to 301, then repeat: 3011 / 903

Step 5:
903 goes into 3011 3 times with a remainder of 302.
The next digit of our result is 3. 
Result so far: 73.0
If we subtract 2709 from 3011, we get 302.
Grab the next digit (3) from the dividend, add it to 302, then carry on: 3023 / 903

Going ahead to step 6:
The number 903 fits into 3023 3 times, leaving a remainder of 314.
Record the quotient 3 as the next digit in the result. 
Result so far: 733.0
Deduct 2709 from 3023 and we're left with 314.
Include the next digit (9) from the dividend after 314, then repeat: 3149 / 903

On to step 7:
If we divide 3149 by 903, we get 3 and a remainder of 440.
Use 3 as the next digit of our solution. 
Result so far: 7333.0
If we subtract 2709 from 3149, we get 440.
Bring next digit (9) of the dividend behind the 440 and repeat the process: 4409 / 903

Going ahead to step 8:
The number 903 fits into 4409 4 times, leaving a remainder of 797.
The number 4 becomes the next digit in our result. 
Result so far: 73334.0
Subtracting 3612 from 4409 leaves us with 797.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7970, and continue the process.

On to step 9:
The number 903 fits into 7970 8 times, leaving a remainder of 746.
Write down 8 as next digit of the result. 
Result so far: 73334.8
If we take 7224 away from 7970, we end up with 746.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7460, and continue the process.

Step 10:
903 goes into 7460 8 times with a remainder of 236.
Write down 8 as next digit of the result. 
Result so far: 73334.88
If we take 7224 away from 7460, we end up with 236.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

The quotient of the division is 73334.88, and the remainder is 0.236.