646575 divided by 31 
Our goal is to divide 646575 by 31.

Let's proceed to step 1:
If we divide 6 by 31, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 31

Step 2:
The number 31 fits into 64 2 times, leaving a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 2 after subtracting 62 from 64.
Take the next digit (6) from the dividend and append it to 2, then repeat: 26 / 31

Step 3:
When dividing 26 by 31, we get 0 with a remainder of 26.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
If we subtract 0 from 26, we get 26.
Fetch the next digit (5) from the dividend, attach it to 26 and continue: 265 / 31

Advancing to step 4:
The number 31 fits into 265 8 times, leaving a remainder of 17.
Record the quotient 8 as the next digit in the result. 
Result so far: 208.0
Subtract 248 from 265 to get 17.
Include the next digit (7) from the dividend after 17, then repeat: 177 / 31

Step 5:
177 divided by 31 is 5 with a remainder of 22.
Record the quotient 5 as the next digit in the result. 
Result so far: 2085.0
The remainder is 22 after subtracting 155 from 177.
Include the next digit (5) from the dividend after 22, then repeat: 225 / 31

On to step 6:
31 can be fit into 225 7 times, resulting in a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 20857.0
Deduct 217 from 225 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 7:
80 divided by 31 is 2 with a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 20857.2
Subtracting 62 from 80 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.

Step 8:
31 goes into 180 5 times with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 20857.25
Subtract 155 from 180 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 9:
If we divide 250 by 31, we get 8 and a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 20857.258
Subtracting 248 from 250 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 10:
If we divide 20 by 31, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 20857.258
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 11:
When dividing 200 by 31, we get 6 with a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 20857.25806
Subtract 186 from 200 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 12:
31 can be fit into 140 4 times, resulting in a remainder of 16.
The next digit of our result is 4. 
Result so far: 20857.258064
If we subtract 124 from 140, we 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.

Step 13:
31 can be fit into 160 5 times, resulting in a remainder of 5.
The next digit of our result is 5. 
Result so far: 20857.2580645
The remainder is 5 after subtracting 155 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 14:
31 can be fit into 50 1 times, resulting in a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 20857.25806451
The remainder is 19 after subtracting 31 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The final result is 20857.25806451 with a remainder of 1.9e-08.