We look at the division of 846869 by 20 
Let's see how many times 20 fits into 846869.

Step 1:
The number 20 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 20

Let's proceed to step 2:
84 divided by 20 is 4 with a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 4 after subtracting 80 from 84.
Fetch the next digit (6) from the dividend, attach it to 4 and continue: 46 / 20

On to step 3:
20 goes into 46 2 times with a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
Subtracting 40 from 46 leaves us with 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 20

Let's proceed to step 4:
20 goes into 68 3 times with a remainder of 8.
The number 3 becomes the next digit in our result. 
Result so far: 423.0
Subtracting 60 from 68 leaves us with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 20

Moving on to step 5:
20 can be fit into 86 4 times, resulting in a remainder of 6.
The next digit of our result is 4. 
Result so far: 4234.0
Deduct 80 from 86 and we're left with 6.
Grab the next digit (9) from the dividend, add it to 6, then carry on: 69 / 20

Step 6:
20 can be fit into 69 3 times, resulting in a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 42343.0
If we take 60 away from 69, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
20 can be fit into 90 4 times, resulting in a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 42343.4
Deduct 80 from 90 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
20 can be fit into 100 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 42343.45
Deduct 100 from 100 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.

Let's proceed to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 42343.45
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.

On to step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 42343.45
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.

The final outcome is 42343.45, with a leftover of 0.0.