We look at the division of 521285 by 3 
Our goal is to divide 521285 by 3.

On to step 1:
5 divided by 3 is 1 with a remainder of 2.
The next digit of our result is 1. 
Result so far: 1.0
If we take 3 away from 5, we end up with 2.
Append the next digit (2) from the dividend to 2 and continue with: 22 / 3

Advancing to step 2:
When dividing 22 by 3, we get 7 with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 17.0
Subtracting 21 from 22 leaves us with 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 3

Let's proceed to step 3:
11 divided by 3 is 3 with a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 173.0
Subtract 9 from 11 to get 2.
Include the next digit (2) from the dividend after 2, then repeat: 22 / 3

Step 4:
The number 3 fits into 22 7 times, leaving a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 1737.0
Deduct 21 from 22 and we're left with 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 3

Moving on to step 5:
3 can be fit into 18 6 times, resulting in a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 17376.0
Deduct 18 from 18 and we're left with 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 3

Let's proceed to step 6:
3 goes into 5 1 times with a remainder of 2.
The next digit of our result is 1. 
Result so far: 173761.0
Deduct 3 from 5 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.

On to step 7:
3 can be fit into 20 6 times, resulting in a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 173761.6
If we take 18 away from 20, we end up 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.

Going ahead to step 8:
3 goes into 20 6 times with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 173761.66
If we take 18 away from 20, we end up 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.

The quotient of the division is 173761.66, and the remainder is 0.002.