We look at the division of 851309 by 4 
Our goal is to divide 851309 by 4.

On to step 1:
4 can be fit into 8 2 times, resulting in a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 8 from 8 and we're left with 0.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 4

Step 2:
The number 4 fits into 5 1 times, leaving a remainder of 1.
The next digit of our result is 1. 
Result so far: 21.0
Subtracting 4 from 5 leaves us with 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 4

On to step 3:
When dividing 11 by 4, we get 2 with a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 212.0
Subtract 8 from 11 to get 3.
Take the next digit (3) from the dividend and append it to 3, then repeat: 33 / 4

Going ahead to step 4:
If we divide 33 by 4, we get 8 and a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 2128.0
If we subtract 32 from 33, we get 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 4

Step 5:
When dividing 10 by 4, we get 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 21282.0
If we take 8 away from 10, we end up with 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 4

Advancing to step 6:
When dividing 29 by 4, we get 7 with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 212827.0
Deduct 28 from 29 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
10 divided by 4 is 2 with a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 212827.2
Deduct 8 from 10 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
If we divide 20 by 4, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 212827.25
If we subtract 20 from 20, 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:
If we divide 0 by 4, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 212827.25
If we take 0 away from 0, we end up 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 4 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 212827.25
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.

The quotient of the division is 212827.25, and the remainder is 0.0.