21271920 divided by 840 
We're looking to find how many times 840 goes into 21271920.

Moving on to step 1:
The number 840 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 840

Step 2:
21 divided by 840 is 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Take the next digit (2) from the dividend and append it to 21, then repeat: 212 / 840

Let's proceed to step 3:
840 goes into 212 0 times with a remainder of 212.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 212 after subtracting 0 from 212.
Grab the next digit (7) from the dividend, add it to 212, then carry on: 2127 / 840

Let's proceed to step 4:
When dividing 2127 by 840, we get 2 with a remainder of 447.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 1680 away from 2127, we end up with 447.
Fetch the next digit (1) from the dividend, attach it to 447 and continue: 4471 / 840

Moving on to step 5:
4471 divided by 840 is 5 with a remainder of 271.
The next digit of our result is 5. 
Result so far: 25.0
Deduct 4200 from 4471 and we're left with 271.
Include the next digit (9) from the dividend after 271, then repeat: 2719 / 840

Step 6:
If we divide 2719 by 840, we get 3 and a remainder of 199.
The next digit of our result is 3. 
Result so far: 253.0
Deduct 2520 from 2719 and we're left with 199.
Fetch the next digit (2) from the dividend, attach it to 199 and continue: 1992 / 840

Let's proceed to step 7:
When dividing 1992 by 840, we get 2 with a remainder of 312.
Record the quotient 2 as the next digit in the result. 
Result so far: 2532.0
Subtract 1680 from 1992 to get 312.
Append the next digit (0) from the dividend to 312 and continue with: 3120 / 840

Let's proceed to step 8:
The number 840 fits into 3120 3 times, leaving a remainder of 600.
Write down 3 as next digit of the result. 
Result so far: 25323.0
Subtracting 2520 from 3120 leaves us with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Moving on to step 9:
When dividing 6000 by 840, we get 7 with a remainder of 120.
The number 7 becomes the next digit in our result. 
Result so far: 25323.7
Subtract 5880 from 6000 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 10:
When dividing 1200 by 840, we get 1 with a remainder of 360.
The number 1 becomes the next digit in our result. 
Result so far: 25323.71
If we subtract 840 from 1200, we get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 11:
If we divide 3600 by 840, we get 4 and a remainder of 240.
Record the quotient 4 as the next digit in the result. 
Result so far: 25323.714
If we take 3360 away from 3600, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Let's proceed to step 12:
When dividing 2400 by 840, we get 2 with a remainder of 720.
Write down 2 as next digit of the result. 
Result so far: 25323.7142
Subtracting 1680 from 2400 leaves us with 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

On to step 13:
7200 divided by 840 is 8 with a remainder of 480.
Use 8 as the next digit of our solution. 
Result so far: 25323.71428
Deduct 6720 from 7200 and we're left with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Let's proceed to step 14:
When dividing 4800 by 840, we get 5 with a remainder of 600.
Put 5 as the next digit of the answer. 
Result so far: 25323.714285
If we take 4200 away from 4800, we end up with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

On to step 15:
If we divide 6000 by 840, we get 7 and a remainder of 120.
Write down 7 as next digit of the result. 
Result so far: 25323.7142857
If we subtract 5880 from 6000, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 16:
If we divide 1200 by 840, we get 1 and a remainder of 360.
Record the quotient 1 as the next digit in the result. 
Result so far: 25323.71428571
Subtracting 840 from 1200 leaves us with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

The final result is 25323.71428571 with a remainder of 3.6e-07.