315638 ÷ 20 
Our goal is to divide 315638 by 20.

Step 1:
When dividing 3 by 20, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 20

Advancing to step 2:
20 can be fit into 31 1 times, resulting in a remainder of 11.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 11 after subtracting 20 from 31.
Fetch the next digit (5) from the dividend, attach it to 11 and continue: 115 / 20

Step 3:
20 goes into 115 5 times with a remainder of 15.
The next digit of our result is 5. 
Result so far: 15.0
Deduct 100 from 115 and we're left with 15.
Take the next digit (6) from the dividend and append it to 15, then repeat: 156 / 20

Moving on to step 4:
20 can be fit into 156 7 times, resulting in a remainder of 16.
Put 7 as the next digit of the answer. 
Result so far: 157.0
If we take 140 away from 156, we end up with 16.
Take the next digit (3) from the dividend and append it to 16, then repeat: 163 / 20

Let's proceed to step 5:
When dividing 163 by 20, we get 8 with a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 1578.0
Subtract 160 from 163 to get 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 20

On to step 6:
When dividing 38 by 20, we get 1 with a remainder of 18.
Use 1 as the next digit of our solution. 
Result so far: 15781.0
The remainder is 18 after subtracting 20 from 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 7:
When dividing 180 by 20, we get 9 with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 15781.9
The remainder is 0 after subtracting 180 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 15781.9
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 15781.9
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 15781.9 with a balance of 0.0.