We're dividing 21181336 by 578 
Let's see how many times 578 fits into 21181336.

Going ahead to step 1:
578 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
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 / 578

On to step 2:
When dividing 21 by 578, we get 0 with 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 (1) from the dividend, attach it to 21 and continue: 211 / 578

Advancing to step 3:
The number 578 fits into 211 0 times, leaving a remainder of 211.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 211, we get 211.
Bring next digit (8) of the dividend behind the 211 and repeat the process: 2118 / 578

Let's proceed to step 4:
578 goes into 2118 3 times with a remainder of 384.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 1734 away from 2118, we end up with 384.
Grab the next digit (1) from the dividend, add it to 384, then carry on: 3841 / 578

Step 5:
578 goes into 3841 6 times with a remainder of 373.
The number 6 becomes the next digit in our result. 
Result so far: 36.0
If we subtract 3468 from 3841, we get 373.
Fetch the next digit (3) from the dividend, attach it to 373 and continue: 3733 / 578

Moving on to step 6:
If we divide 3733 by 578, we get 6 and a remainder of 265.
Put 6 as the next digit of the answer. 
Result so far: 366.0
If we subtract 3468 from 3733, we get 265.
Fetch the next digit (3) from the dividend, attach it to 265 and continue: 2653 / 578

Let's proceed to step 7:
When dividing 2653 by 578, we get 4 with a remainder of 341.
Use 4 as the next digit of our solution. 
Result so far: 3664.0
Deduct 2312 from 2653 and we're left with 341.
Append the next digit (6) from the dividend to 341 and continue with: 3416 / 578

Moving on to step 8:
578 goes into 3416 5 times with a remainder of 526.
The next digit of our result is 5. 
Result so far: 36645.0
Subtracting 2890 from 3416 leaves us with 526.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5260, and continue the process.

Going ahead to step 9:
578 goes into 5260 9 times with a remainder of 58.
The next digit of our result is 9. 
Result so far: 36645.9
Deduct 5202 from 5260 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 10:
578 can be fit into 580 1 times, resulting in a remainder of 2.
The next digit of our result is 1. 
Result so far: 36645.91
The remainder is 2 after subtracting 578 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 11:
When dividing 20 by 578, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 36645.91
Subtracting 0 from 20 leaves us 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.

Step 12:
578 goes into 200 0 times with a remainder of 200.
The next digit of our result is 0. 
Result so far: 36645.91
The remainder is 200 after subtracting 0 from 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 final result is 36645.91 with a remainder of 0.002.