Let's divide 782853 by 21
Let's see how many times 21 fits into 782853.

Step 1:
The number 21 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 21

Step 2:
The number 21 fits into 78 3 times, leaving a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 15 after subtracting 63 from 78.
Take the next digit (2) from the dividend and append it to 15, then repeat: 152 / 21

On to step 3:
The number 21 fits into 152 7 times, leaving a remainder of 5.
The number 7 becomes the next digit in our result. 
Result so far: 37.0
If we take 147 away from 152, we end up with 5.
Fetch the next digit (8) from the dividend, attach it to 5 and continue: 58 / 21

Moving on to step 4:
21 can be fit into 58 2 times, resulting in a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 372.0
Deduct 42 from 58 and we're left with 16.
Fetch the next digit (5) from the dividend, attach it to 16 and continue: 165 / 21

On to step 5:
If we divide 165 by 21, we get 7 and a remainder of 18.
Put 7 as the next digit of the answer. 
Result so far: 3727.0
Subtracting 147 from 165 leaves us with 18.
Append the next digit (3) from the dividend to 18 and continue with: 183 / 21

Step 6:
21 goes into 183 8 times with a remainder of 15.
Record the quotient 8 as the next digit in the result. 
Result so far: 37278.0
The remainder is 15 after subtracting 168 from 183.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
The number 21 fits into 150 7 times, leaving a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 37278.7
Subtract 147 from 150 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 8:
If we divide 30 by 21, we get 1 and a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 37278.71
If we subtract 21 from 30, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 9:
21 can be fit into 90 4 times, resulting in a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 37278.714
The remainder is 6 after subtracting 84 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 10:
21 goes into 60 2 times with a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 37278.7142
If we take 42 away from 60, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 11:
If we divide 180 by 21, we get 8 and a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 37278.71428
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 12:
If we divide 120 by 21, we get 5 and a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 37278.714285
If we subtract 105 from 120, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 13:
150 divided by 21 is 7 with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 37278.7142857
Deduct 147 from 150 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 14:
The number 21 fits into 30 1 times, leaving a remainder of 9.
The next digit of our result is 1. 
Result so far: 37278.71428571
The remainder is 9 after subtracting 21 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

After the division, we end up with 37278.71428571 and a remainder of 9e-09.