857029 ÷ 20 
We want to figure out the number of times 857029 can be divided by 20.

Going ahead to step 1:
20 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 20

Going ahead to step 2:
20 can be fit into 85 4 times, resulting in a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 5 after subtracting 80 from 85.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 20

Advancing to step 3:
20 can be fit into 57 2 times, resulting in a remainder of 17.
Put 2 as the next digit of the answer. 
Result so far: 42.0
Subtract 40 from 57 to get 17.
Take the next digit (0) from the dividend and append it to 17, then repeat: 170 / 20

Step 4:
170 divided by 20 is 8 with a remainder of 10.
Write down 8 as next digit of the result. 
Result so far: 428.0
If we take 160 away from 170, we end up with 10.
Fetch the next digit (2) from the dividend, attach it to 10 and continue: 102 / 20

Let's proceed to step 5:
If we divide 102 by 20, we get 5 and a remainder of 2.
Put 5 as the next digit of the answer. 
Result so far: 4285.0
If we take 100 away from 102, we end up with 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 20

Advancing to step 6:
The number 20 fits into 29 1 times, leaving a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 42851.0
If we take 20 away from 29, 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.

On to step 7:
90 divided by 20 is 4 with a remainder of 10.
Use 4 as the next digit of our solution. 
Result so far: 42851.4
Subtract 80 from 90 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.

Advancing to step 8:
20 goes into 100 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 42851.45
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.

On to step 9:
20 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 42851.45
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.

Step 10:
20 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 42851.45
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.

The quotient of the division is 42851.45, and the remainder is 0.0.