We divide 312590 by 20
Our goal is to divide 312590 by 20.

Advancing to step 1:
20 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 20

Going ahead to step 2:
20 goes into 31 1 times with a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 20 away from 31, we end up with 11.
Include the next digit (2) from the dividend after 11, then repeat: 112 / 20

Going ahead to step 3:
20 goes into 112 5 times with a remainder of 12.
Write down 5 as next digit of the result. 
Result so far: 15.0
If we take 100 away from 112, we end up with 12.
Fetch the next digit (5) from the dividend, attach it to 12 and continue: 125 / 20

Advancing to step 4:
20 goes into 125 6 times with a remainder of 5.
Write down 6 as next digit of the result. 
Result so far: 156.0
If we take 120 away from 125, we end up with 5.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 20

Let's proceed to step 5:
20 can be fit into 59 2 times, resulting in a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 1562.0
Subtracting 40 from 59 leaves us with 19.
Grab the next digit (0) from the dividend, add it to 19, then carry on: 190 / 20

Step 6:
When dividing 190 by 20, we get 9 with a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 15629.0
Subtract 180 from 190 to 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.

Let's proceed to step 7:
The number 20 fits into 100 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 15629.5
Subtracting 100 from 100 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.

On to step 8:
0 divided by 20 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 15629.5
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.

On 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: 15629.5
If we take 0 away from 0, we end up 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.

In conclusion, the division gives 15629.5 with a balance of 0.0.