707257 divided by 21 
Let's see how many times 21 fits into 707257.

Going ahead to step 1:
If we divide 7 by 21, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 21

Moving on to step 2:
21 can be fit into 70 3 times, resulting in a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Deduct 63 from 70 and we're left with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 21

Step 3:
When dividing 77 by 21, we get 3 with a remainder of 14.
Write down 3 as next digit of the result. 
Result so far: 33.0
Subtract 63 from 77 to get 14.
Take the next digit (2) from the dividend and append it to 14, then repeat: 142 / 21

Moving on to step 4:
When dividing 142 by 21, we get 6 with a remainder of 16.
Record the quotient 6 as the next digit in the result. 
Result so far: 336.0
Subtracting 126 from 142 leaves us with 16.
Take the next digit (5) from the dividend and append it to 16, then repeat: 165 / 21

Going ahead to step 5:
If we divide 165 by 21, we get 7 and a remainder of 18.
The number 7 becomes the next digit in our result. 
Result so far: 3367.0
Deduct 147 from 165 and we're left with 18.
Grab the next digit (7) from the dividend, add it to 18, then carry on: 187 / 21

On to step 6:
21 goes into 187 8 times with a remainder of 19.
Put 8 as the next digit of the answer. 
Result so far: 33678.0
If we subtract 168 from 187, 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.

Advancing to step 7:
When dividing 190 by 21, we get 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 33678.9
Deduct 189 from 190 and we're left 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.

Moving on to step 8:
The number 21 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 33678.9
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.

Moving on to step 9:
21 can be fit into 100 4 times, resulting in a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 33678.904
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.

On to step 10:
If we divide 160 by 21, we get 7 and a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 33678.9047
If we take 147 away from 160, we end up 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.

Going ahead to step 11:
21 can be fit into 130 6 times, resulting in a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 33678.90476
Deduct 126 from 130 and we're left 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.

Moving on to step 12:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 33678.904761
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.

Moving on to step 13:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 33678.9047619
Subtract 189 from 190 to 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 14:
When dividing 10 by 21, we get 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 33678.9047619
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.

The final outcome is 33678.9047619, with a leftover of 1e-08.