879539 divided by 20 
We're looking to find how many times 20 goes into 879539.

Going ahead to step 1:
8 divided by 20 is 0 with 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.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 20

Moving on to step 2:
The number 20 fits into 87 4 times, leaving a remainder of 7.
The next digit of our result is 4. 
Result so far: 4.0
If we take 80 away from 87, we end up with 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 20

Let's proceed to step 3:
The number 20 fits into 79 3 times, leaving a remainder of 19.
The next digit of our result is 3. 
Result so far: 43.0
If we take 60 away from 79, we end up with 19.
Take the next digit (5) from the dividend and append it to 19, then repeat: 195 / 20

Advancing to step 4:
The number 20 fits into 195 9 times, leaving a remainder of 15.
Put 9 as the next digit of the answer. 
Result so far: 439.0
If we take 180 away from 195, we end up with 15.
Take the next digit (3) from the dividend and append it to 15, then repeat: 153 / 20

Step 5:
When dividing 153 by 20, we get 7 with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 4397.0
Subtracting 140 from 153 leaves us with 13.
Grab the next digit (9) from the dividend, add it to 13, then carry on: 139 / 20

Let's proceed to step 6:
When dividing 139 by 20, we get 6 with a remainder of 19.
Write down 6 as next digit of the result. 
Result so far: 43976.0
Subtracting 120 from 139 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 7:
190 divided by 20 is 9 with a remainder of 10.
Put 9 as the next digit of the answer. 
Result so far: 43976.9
If we subtract 180 from 190, we 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.

Going ahead to step 8:
When dividing 100 by 20, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 43976.95
Subtract 100 from 100 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.

Step 9:
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: 43976.95
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.

Moving on to step 10:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 43976.95
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.

After the division, we end up with 43976.95 and a remainder of 0.0.