21090840 ÷ 569 
We want to divide 21090840 by 569.

On to step 1:
2 divided by 569 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 569

Advancing to step 2:
The number 569 fits into 21 0 times, leaving a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Include the next digit (0) from the dividend after 21, then repeat: 210 / 569

Going ahead to step 3:
569 goes into 210 0 times with a remainder of 210.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 210 and we're left with 210.
Append the next digit (9) from the dividend to 210 and continue with: 2109 / 569

Let's proceed to step 4:
569 goes into 2109 3 times with a remainder of 402.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 1707 from 2109, we get 402.
Append the next digit (0) from the dividend to 402 and continue with: 4020 / 569

Step 5:
569 goes into 4020 7 times with a remainder of 37.
The next digit of our result is 7. 
Result so far: 37.0
If we take 3983 away from 4020, we end up with 37.
Grab the next digit (8) from the dividend, add it to 37, then carry on: 378 / 569

Going ahead to step 6:
The number 569 fits into 378 0 times, leaving a remainder of 378.
Use 0 as the next digit of our solution. 
Result so far: 370.0
Subtract 0 from 378 to get 378.
Take the next digit (4) from the dividend and append it to 378, then repeat: 3784 / 569

Let's proceed to step 7:
569 can be fit into 3784 6 times, resulting in a remainder of 370.
Record the quotient 6 as the next digit in the result. 
Result so far: 3706.0
If we take 3414 away from 3784, we end up with 370.
Fetch the next digit (0) from the dividend, attach it to 370 and continue: 3700 / 569

Moving on to step 8:
When dividing 3700 by 569, we get 6 with a remainder of 286.
The number 6 becomes the next digit in our result. 
Result so far: 37066.0
The remainder is 286 after subtracting 3414 from 3700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Going ahead to step 9:
2860 divided by 569 is 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 37066.5
Subtracting 2845 from 2860 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 10:
The number 569 fits into 150 0 times, leaving a remainder of 150.
Write down 0 as next digit of the result. 
Result so far: 37066.5
If we take 0 away from 150, we end up with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Advancing to step 11:
The number 569 fits into 1500 2 times, leaving a remainder of 362.
Put 2 as the next digit of the answer. 
Result so far: 37066.502
Subtract 1138 from 1500 to get 362.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

On to step 12:
If we divide 3620 by 569, we get 6 and a remainder of 206.
Put 6 as the next digit of the answer. 
Result so far: 37066.5026
Deduct 3414 from 3620 and we're left with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Moving on to step 13:
When dividing 2060 by 569, we get 3 with a remainder of 353.
Use 3 as the next digit of our solution. 
Result so far: 37066.50263
Subtract 1707 from 2060 to get 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

Going ahead to step 14:
The number 569 fits into 3530 6 times, leaving a remainder of 116.
Put 6 as the next digit of the answer. 
Result so far: 37066.502636
Subtract 3414 from 3530 to get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Step 15:
When dividing 1160 by 569, we get 2 with a remainder of 22.
Write down 2 as next digit of the result. 
Result so far: 37066.5026362
Subtracting 1138 from 1160 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 16:
569 goes into 220 0 times with a remainder of 220.
Put 0 as the next digit of the answer. 
Result so far: 37066.5026362
Deduct 0 from 220 and we're left with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

After the division, we end up with 37066.5026362 and a remainder of 2.2e-07.