Let's divide 21211834 by 817
Our goal is to divide 21211834 by 817.

On to step 1:
817 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 817

Going ahead to step 2:
The number 817 fits into 21 0 times, leaving a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Grab the next digit (2) from the dividend, add it to 21, then carry on: 212 / 817

Step 3:
The number 817 fits into 212 0 times, leaving a remainder of 212.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 212, we end up with 212.
Take the next digit (1) from the dividend and append it to 212, then repeat: 2121 / 817

Advancing to step 4:
817 goes into 2121 2 times with a remainder of 487.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 1634 from 2121, we get 487.
Include the next digit (1) from the dividend after 487, then repeat: 4871 / 817

Let's proceed to step 5:
817 can be fit into 4871 5 times, resulting in a remainder of 786.
The next digit of our result is 5. 
Result so far: 25.0
Subtract 4085 from 4871 to get 786.
Bring next digit (8) of the dividend behind the 786 and repeat the process: 7868 / 817

Let's proceed to step 6:
817 goes into 7868 9 times with a remainder of 515.
Write down 9 as next digit of the result. 
Result so far: 259.0
Deduct 7353 from 7868 and we're left with 515.
Grab the next digit (3) from the dividend, add it to 515, then carry on: 5153 / 817

Let's proceed to step 7:
5153 divided by 817 is 6 with a remainder of 251.
The next digit of our result is 6. 
Result so far: 2596.0
Subtracting 4902 from 5153 leaves us with 251.
Grab the next digit (4) from the dividend, add it to 251, then carry on: 2514 / 817

Step 8:
2514 divided by 817 is 3 with a remainder of 63.
Write down 3 as next digit of the result. 
Result so far: 25963.0
If we subtract 2451 from 2514, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

On to step 9:
The number 817 fits into 630 0 times, leaving a remainder of 630.
The number 0 becomes the next digit in our result. 
Result so far: 25963.0
Deduct 0 from 630 and we're left with 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Let's proceed to step 10:
When dividing 6300 by 817, we get 7 with a remainder of 581.
Put 7 as the next digit of the answer. 
Result so far: 25963.07
Subtracting 5719 from 6300 leaves us with 581.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5810, and continue the process.

Advancing to step 11:
817 can be fit into 5810 7 times, resulting in a remainder of 91.
Record the quotient 7 as the next digit in the result. 
Result so far: 25963.077
Subtracting 5719 from 5810 leaves us with 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Our division results in 25963.077 with a remaining 0.0091.