We look at the division of 648579 by 31 
We want to divide 648579 by 31.

Advancing to step 1:
31 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 31

Advancing to step 2:
If we divide 64 by 31, we get 2 and a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 62 from 64 and we're left with 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 31

Advancing to step 3:
31 can be fit into 28 0 times, resulting in a remainder of 28.
Put 0 as the next digit of the answer. 
Result so far: 20.0
If we subtract 0 from 28, we get 28.
Bring next digit (5) of the dividend behind the 28 and repeat the process: 285 / 31

Step 4:
If we divide 285 by 31, we get 9 and a remainder of 6.
The next digit of our result is 9. 
Result so far: 209.0
If we subtract 279 from 285, we get 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 31

Step 5:
The number 31 fits into 67 2 times, leaving a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 2092.0
If we subtract 62 from 67, we get 5.
Bring next digit (9) of the dividend behind the 5 and repeat the process: 59 / 31

Let's proceed to step 6:
If we divide 59 by 31, we get 1 and a remainder of 28.
Record the quotient 1 as the next digit in the result. 
Result so far: 20921.0
The remainder is 28 after subtracting 31 from 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 7:
When dividing 280 by 31, we get 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 20921.9
Deduct 279 from 280 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.

Step 8:
The number 31 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 20921.9
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 9:
If we divide 100 by 31, we get 3 and a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 20921.903
The remainder is 7 after subtracting 93 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 10:
The number 31 fits into 70 2 times, leaving a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 20921.9032
If we take 62 away from 70, we end up 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 11:
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: 20921.90322
If we take 62 away from 80, 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.

In conclusion, the division gives 20921.90322 with a balance of 1.8e-05.