We look at the division of 40870 by 20 
Our goal is to divide 40870 by 20.

Step 1:
20 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 20

Moving on to step 2:
The number 20 fits into 40 2 times, leaving a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 40 from 40 leaves us with 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 20

Let's proceed to step 3:
8 divided by 20 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 20

On to step 4:
20 goes into 87 4 times with a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 204.0
Deduct 80 from 87 and we're left with 7.
Bring next digit (0) of the dividend behind the 7 and repeat the process: 70 / 20

Advancing to step 5:
When dividing 70 by 20, we get 3 with a remainder of 10.
The next digit of our result is 3. 
Result so far: 2043.0
Subtract 60 from 70 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.

On to step 6:
If we divide 100 by 20, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 2043.5
If we subtract 100 from 100, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 7:
0 divided by 20 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 2043.5
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.

Going ahead to step 8:
20 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 2043.5
Subtract 0 from 0 to get 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 2043.5 with a balance of 0.0.