Let's divide 21679255 by 581
We want to figure out the number of times 21679255 can be divided by 581.

Step 1:
If we divide 2 by 581, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 581

Going ahead to step 2:
581 goes into 21 0 times with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Include the next digit (6) from the dividend after 21, then repeat: 216 / 581

Moving on to step 3:
581 goes into 216 0 times with a remainder of 216.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 216 leaves us with 216.
Include the next digit (7) from the dividend after 216, then repeat: 2167 / 581

Moving on to step 4:
2167 divided by 581 is 3 with a remainder of 424.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 424 after subtracting 1743 from 2167.
Fetch the next digit (9) from the dividend, attach it to 424 and continue: 4249 / 581

On to step 5:
The number 581 fits into 4249 7 times, leaving a remainder of 182.
Record the quotient 7 as the next digit in the result. 
Result so far: 37.0
Deduct 4067 from 4249 and we're left with 182.
Bring next digit (2) of the dividend behind the 182 and repeat the process: 1822 / 581

On to step 6:
If we divide 1822 by 581, we get 3 and a remainder of 79.
Record the quotient 3 as the next digit in the result. 
Result so far: 373.0
If we take 1743 away from 1822, we end up with 79.
Grab the next digit (5) from the dividend, add it to 79, then carry on: 795 / 581

Moving on to step 7:
581 can be fit into 795 1 times, resulting in a remainder of 214.
The next digit of our result is 1. 
Result so far: 3731.0
If we take 581 away from 795, we end up with 214.
Fetch the next digit (5) from the dividend, attach it to 214 and continue: 2145 / 581

Moving on to step 8:
581 goes into 2145 3 times with a remainder of 402.
Write down 3 as next digit of the result. 
Result so far: 37313.0
Subtract 1743 from 2145 to get 402.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

Step 9:
If we divide 4020 by 581, we get 6 and a remainder of 534.
Use 6 as the next digit of our solution. 
Result so far: 37313.6
Subtract 3486 from 4020 to get 534.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5340, and continue the process.

Advancing to step 10:
581 goes into 5340 9 times with a remainder of 111.
Write down 9 as next digit of the result. 
Result so far: 37313.69
The remainder is 111 after subtracting 5229 from 5340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

On to step 11:
The number 581 fits into 1110 1 times, leaving a remainder of 529.
The number 1 becomes the next digit in our result. 
Result so far: 37313.691
Subtracting 581 from 1110 leaves us with 529.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5290, and continue the process.

Moving on to step 12:
581 goes into 5290 9 times with a remainder of 61.
Put 9 as the next digit of the answer. 
Result so far: 37313.6919
The remainder is 61 after subtracting 5229 from 5290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Let's proceed to step 13:
581 can be fit into 610 1 times, resulting in a remainder of 29.
Use 1 as the next digit of our solution. 
Result so far: 37313.69191
Deduct 581 from 610 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 14:
If we divide 290 by 581, we get 0 and a remainder of 290.
Record the quotient 0 as the next digit in the result. 
Result so far: 37313.69191
If we subtract 0 from 290, we get 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Let's proceed to step 15:
If we divide 2900 by 581, we get 4 and a remainder of 576.
Record the quotient 4 as the next digit in the result. 
Result so far: 37313.6919104
Subtract 2324 from 2900 to get 576.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5760, and continue the process.

On to step 16:
When dividing 5760 by 581, we get 9 with a remainder of 531.
Write down 9 as next digit of the result. 
Result so far: 37313.69191049
Deduct 5229 from 5760 and we're left with 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

The final outcome is 37313.69191049, with a leftover of 5.31e-07.