861503 divided by 3 
Our goal is to divide 861503 by 3.

Advancing to step 1:
The number 3 fits into 8 2 times, leaving a remainder of 2.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 2 after subtracting 6 from 8.
Bring next digit (6) of the dividend behind the 2 and repeat the process: 26 / 3

Step 2:
26 divided by 3 is 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 28.0
Subtract 24 from 26 to get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 3

Step 3:
When dividing 21 by 3, we get 7 with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 287.0
Subtracting 21 from 21 leaves us with 0.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 3

Going ahead to step 4:
3 can be fit into 5 1 times, resulting in a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 2871.0
Deduct 3 from 5 and we're left with 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 3

Moving on to step 5:
If we divide 20 by 3, we get 6 and a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 28716.0
Subtracting 18 from 20 leaves us with 2.
Grab the next digit (3) from the dividend, add it to 2, then carry on: 23 / 3

Going ahead to step 6:
When dividing 23 by 3, we get 7 with a remainder of 2.
The next digit of our result is 7. 
Result so far: 287167.0
Subtract 21 from 23 to get 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:
The number 3 fits into 20 6 times, leaving a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 287167.6
Subtracting 18 from 20 leaves us 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.

Step 8:
3 can be fit into 20 6 times, resulting in a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 287167.66
The remainder is 2 after subtracting 18 from 20.
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 287167.66, and the remainder is 0.002.