We're dividing 878012 by 20 
We're looking to find how many times 20 goes into 878012.

Advancing to step 1:
When dividing 8 by 20, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 20

Step 2:
20 can be fit into 87 4 times, resulting in a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Deduct 80 from 87 and we're left with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 20

Going ahead to step 3:
The number 20 fits into 78 3 times, leaving a remainder of 18.
Put 3 as the next digit of the answer. 
Result so far: 43.0
Subtract 60 from 78 to get 18.
Fetch the next digit (0) from the dividend, attach it to 18 and continue: 180 / 20

On to step 4:
When dividing 180 by 20, we get 9 with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 439.0
Deduct 180 from 180 and we're left with 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 20

Step 5:
When dividing 1 by 20, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 4390.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 20

Step 6:
If we divide 12 by 20, we get 0 and a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 43900.0
Deduct 0 from 12 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 7:
20 goes into 120 6 times with a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 43900.6
Subtract 120 from 120 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.

Going ahead to step 8:
When dividing 0 by 20, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 43900.6
If we subtract 0 from 0, 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.

Moving on to step 9:
20 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 43900.6
Deduct 0 from 0 and we're left 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.

The final outcome is 43900.6, with a leftover of 0.0.