386781 divided by 3 
Our goal is to divide 386781 by 3.

On to step 1:
The number 3 fits into 3 1 times, leaving a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 3 from 3 and we're left with 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 3

Moving on to step 2:
3 goes into 8 2 times with a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 12.0
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

On to step 3:
When dividing 26 by 3, we get 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 128.0
If we subtract 24 from 26, we get 2.
Append the next digit (7) from the dividend to 2 and continue with: 27 / 3

Going ahead to step 4:
The number 3 fits into 27 9 times, leaving a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 1289.0
If we subtract 27 from 27, we get 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 3

Step 5:
8 divided by 3 is 2 with a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 12892.0
Subtract 6 from 8 to get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 3

Step 6:
When dividing 21 by 3, we get 7 with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 128927.0
Deduct 21 from 21 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.

Advancing to step 7:
3 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 128927.0
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.

Going ahead to step 8:
0 divided by 3 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 128927.0
Deduct 0 from 0 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.

After the division, we end up with 128927.0 and a remainder of 0.0.