21013023 ÷ 587 
We're looking to find how many times 587 goes into 21013023.

Let's proceed to step 1:
2 divided by 587 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 587

Going ahead to step 2:
The number 587 fits into 21 0 times, leaving a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Include the next digit (0) from the dividend after 21, then repeat: 210 / 587

Advancing to step 3:
If we divide 210 by 587, we get 0 and a remainder of 210.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 210 leaves us with 210.
Include the next digit (1) from the dividend after 210, then repeat: 2101 / 587

On to step 4:
The number 587 fits into 2101 3 times, leaving a remainder of 340.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 1761 away from 2101, we end up with 340.
Fetch the next digit (3) from the dividend, attach it to 340 and continue: 3403 / 587

Going ahead to step 5:
When dividing 3403 by 587, we get 5 with a remainder of 468.
The next digit of our result is 5. 
Result so far: 35.0
Subtracting 2935 from 3403 leaves us with 468.
Include the next digit (0) from the dividend after 468, then repeat: 4680 / 587

Going ahead to step 6:
When dividing 4680 by 587, we get 7 with a remainder of 571.
Use 7 as the next digit of our solution. 
Result so far: 357.0
Deduct 4109 from 4680 and we're left with 571.
Append the next digit (2) from the dividend to 571 and continue with: 5712 / 587

Going ahead to step 7:
If we divide 5712 by 587, we get 9 and a remainder of 429.
Put 9 as the next digit of the answer. 
Result so far: 3579.0
Subtract 5283 from 5712 to get 429.
Bring next digit (3) of the dividend behind the 429 and repeat the process: 4293 / 587

Going ahead to step 8:
The number 587 fits into 4293 7 times, leaving a remainder of 184.
The next digit of our result is 7. 
Result so far: 35797.0
Subtract 4109 from 4293 to get 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Going ahead to step 9:
1840 divided by 587 is 3 with a remainder of 79.
The number 3 becomes the next digit in our result. 
Result so far: 35797.3
Deduct 1761 from 1840 and we're left with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Let's proceed to step 10:
If we divide 790 by 587, we get 1 and a remainder of 203.
Write down 1 as next digit of the result. 
Result so far: 35797.31
Subtract 587 from 790 to get 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Advancing to step 11:
587 goes into 2030 3 times with a remainder of 269.
Put 3 as the next digit of the answer. 
Result so far: 35797.313
Deduct 1761 from 2030 and we're left with 269.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2690, and continue the process.

Going ahead to step 12:
If we divide 2690 by 587, we get 4 and a remainder of 342.
The number 4 becomes the next digit in our result. 
Result so far: 35797.3134
If we take 2348 away from 2690, we end up with 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Let's proceed to step 13:
The number 587 fits into 3420 5 times, leaving a remainder of 485.
Put 5 as the next digit of the answer. 
Result so far: 35797.31345
If we subtract 2935 from 3420, we get 485.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4850, and continue the process.

Let's proceed to step 14:
If we divide 4850 by 587, we get 8 and a remainder of 154.
Record the quotient 8 as the next digit in the result. 
Result so far: 35797.313458
Subtract 4696 from 4850 to get 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Going ahead to step 15:
If we divide 1540 by 587, we get 2 and a remainder of 366.
Use 2 as the next digit of our solution. 
Result so far: 35797.3134582
Deduct 1174 from 1540 and we're left with 366.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

Moving on to step 16:
If we divide 3660 by 587, we get 6 and a remainder of 138.
Record the quotient 6 as the next digit in the result. 
Result so far: 35797.31345826
Deduct 3522 from 3660 and we're left with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

The final result is 35797.31345826 with a remainder of 1.38e-07.