We divide 671700 by 21
We're looking to find how many times 21 goes into 671700.

Advancing to step 1:
When dividing 6 by 21, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 21

Moving on to step 2:
67 divided by 21 is 3 with a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 63 from 67 and we're left with 4.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 21

On to step 3:
If we divide 41 by 21, we get 1 and a remainder of 20.
Write down 1 as next digit of the result. 
Result so far: 31.0
If we take 21 away from 41, we end up with 20.
Fetch the next digit (7) from the dividend, attach it to 20 and continue: 207 / 21

Step 4:
If we divide 207 by 21, we get 9 and a remainder of 18.
Write down 9 as next digit of the result. 
Result so far: 319.0
If we subtract 189 from 207, we get 18.
Bring next digit (0) of the dividend behind the 18 and repeat the process: 180 / 21

On to step 5:
180 divided by 21 is 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 3198.0
Deduct 168 from 180 and we're left with 12.
Grab the next digit (0) from the dividend, add it to 12, then carry on: 120 / 21

Step 6:
21 goes into 120 5 times with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 31985.0
If we take 105 away from 120, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 7:
The number 21 fits into 150 7 times, leaving a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 31985.7
Subtracting 147 from 150 leaves us 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.

Moving on to step 8:
30 divided by 21 is 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 31985.71
Deduct 21 from 30 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 9:
21 can be fit into 90 4 times, resulting in a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 31985.714
Subtract 84 from 90 to get 6.
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:
If we divide 60 by 21, we get 2 and a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 31985.7142
Subtracting 42 from 60 leaves us 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:
180 divided by 21 is 8 with a remainder of 12.
The next digit of our result is 8. 
Result so far: 31985.71428
If we take 168 away from 180, we end up 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.

Going ahead to step 12:
21 goes into 120 5 times with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 31985.714285
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.

Advancing to step 13:
The number 21 fits into 150 7 times, leaving a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 31985.7142857
Subtracting 147 from 150 leaves us 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.

Going ahead to step 14:
The number 21 fits into 30 1 times, leaving a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 31985.71428571
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.

The quotient of the division is 31985.71428571, and the remainder is 9e-09.