Let's divide 638720 by 31
We're looking to find how many times 31 goes into 638720.

Going ahead to step 1:
31 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 31

On to step 2:
If we divide 63 by 31, we get 2 and a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 62 away from 63, we end up with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 31

Going ahead to step 3:
31 can be fit into 18 0 times, resulting in a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Deduct 0 from 18 and we're left with 18.
Grab the next digit (7) from the dividend, add it to 18, then carry on: 187 / 31

Let's proceed to step 4:
If we divide 187 by 31, we get 6 and a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 206.0
Subtracting 186 from 187 leaves us with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 31

Going ahead to step 5:
12 divided by 31 is 0 with a remainder of 12.
The next digit of our result is 0. 
Result so far: 2060.0
The remainder is 12 after subtracting 0 from 12.
Fetch the next digit (0) from the dividend, attach it to 12 and continue: 120 / 31

Let's proceed to step 6:
120 divided by 31 is 3 with a remainder of 27.
Use 3 as the next digit of our solution. 
Result so far: 20603.0
If we subtract 93 from 120, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 7:
31 can be fit into 270 8 times, resulting in a remainder of 22.
The next digit of our result is 8. 
Result so far: 20603.8
Subtracting 248 from 270 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 8:
When dividing 220 by 31, we get 7 with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 20603.87
Deduct 217 from 220 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.

Let's proceed to step 9:
31 goes into 30 0 times with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 20603.87
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 10:
31 goes into 300 9 times with a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 20603.8709
Deduct 279 from 300 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 11:
31 goes into 210 6 times with a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 20603.87096
Subtract 186 from 210 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 12:
240 divided by 31 is 7 with a remainder of 23.
Record the quotient 7 as the next digit in the result. 
Result so far: 20603.870967
If we subtract 217 from 240, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 13:
The number 31 fits into 230 7 times, leaving a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 20603.8709677
Subtract 217 from 230 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

In conclusion, the division gives 20603.8709677 with a balance of 1.3e-07.