401521 ÷ 6 
We want to divide 401521 by 6.

Step 1:
The number 6 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 6

Going ahead to step 2:
40 divided by 6 is 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtract 36 from 40 to get 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 6

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
Subtract 36 from 41 to get 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 6

Going ahead to step 4:
6 goes into 55 9 times with a remainder of 1.
The next digit of our result is 9. 
Result so far: 669.0
The remainder is 1 after subtracting 54 from 55.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 6

Moving on to step 5:
12 divided by 6 is 2 with a remainder of 0.
The next digit of our result is 2. 
Result so far: 6692.0
Deduct 12 from 12 and we're left with 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 6

On to step 6:
6 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 66920.0
If we subtract 0 from 1, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
6 goes into 10 1 times with a remainder of 4.
The number 1 becomes the next digit in our result. 
Result so far: 66920.1
The remainder is 4 after subtracting 6 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 8:
6 goes into 40 6 times with a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 66920.16
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 9:
40 divided by 6 is 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 66920.166
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 66920.166 and a remainder of 0.0004.