We divide 259291 by 21
Let's see how many times 21 fits into 259291.

Advancing to step 1:
2 divided by 21 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 21

Advancing to step 2:
If we divide 25 by 21, we get 1 and a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 21 away from 25, we end up with 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 21

Let's proceed to step 3:
If we divide 49 by 21, we get 2 and a remainder of 7.
Write down 2 as next digit of the result. 
Result so far: 12.0
The remainder is 7 after subtracting 42 from 49.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 21

Moving on to step 4:
21 goes into 72 3 times with a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 123.0
Subtracting 63 from 72 leaves us with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 21

Step 5:
21 goes into 99 4 times with a remainder of 15.
Record the quotient 4 as the next digit in the result. 
Result so far: 1234.0
Deduct 84 from 99 and we're left with 15.
Append the next digit (1) from the dividend to 15 and continue with: 151 / 21

Moving on to step 6:
21 goes into 151 7 times with a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 12347.0
Subtracting 147 from 151 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 7:
If we divide 40 by 21, we get 1 and a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 12347.1
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 8:
21 can be fit into 190 9 times, resulting in a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 12347.19
If we subtract 189 from 190, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 9:
21 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 12347.19
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 10:
21 goes into 100 4 times with a remainder of 16.
The next digit of our result is 4. 
Result so far: 12347.1904
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 11:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 12347.19047
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 12:
21 goes into 130 6 times with a remainder of 4.
The next digit of our result is 6. 
Result so far: 12347.190476
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 13:
The number 21 fits into 40 1 times, leaving a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 12347.1904761
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 14:
When dividing 190 by 21, we get 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 12347.19047619
If we take 189 away from 190, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

After the division, we end up with 12347.19047619 and a remainder of 1e-09.