We look at the division of 401639 by 6 
Let's see how many times 6 fits into 401639.

On to step 1:
6 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 6

Moving on to step 2:
40 divided by 6 is 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 6.0
The remainder is 4 after subtracting 36 from 40.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 6

Going ahead to step 3:
If we divide 41 by 6, we get 6 and a remainder of 5.
Record the quotient 6 as the next digit in the result. 
Result so far: 66.0
If we subtract 36 from 41, we get 5.
Bring next digit (6) of the dividend behind the 5 and repeat the process: 56 / 6

Let's proceed to step 4:
6 goes into 56 9 times with a remainder of 2.
Put 9 as the next digit of the answer. 
Result so far: 669.0
If we take 54 away from 56, we end up with 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 6

Going ahead to step 5:
If we divide 23 by 6, we get 3 and a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 6693.0
Subtract 18 from 23 to get 5.
Grab the next digit (9) from the dividend, add it to 5, then carry on: 59 / 6

Going ahead to step 6:
The number 6 fits into 59 9 times, leaving a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 66939.0
If we subtract 54 from 59, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 7:
If we divide 50 by 6, we get 8 and a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 66939.8
Subtracting 48 from 50 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.

Advancing to step 8:
20 divided by 6 is 3 with a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 66939.83
Subtract 18 from 20 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.

Going ahead to step 9:
If we divide 20 by 6, we get 3 and a remainder of 2.
The next digit of our result is 3. 
Result so far: 66939.833
If we subtract 18 from 20, we 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.

The quotient of the division is 66939.833, and the remainder is 0.0002.