400401 ÷ 63 
Let's see how many times 63 fits into 400401.

On to step 1:
The number 63 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 63

Step 2:
40 divided by 63 is 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Bring next digit (0) of the dividend behind the 40 and repeat the process: 400 / 63

Moving on to step 3:
The number 63 fits into 400 6 times, leaving a remainder of 22.
The next digit of our result is 6. 
Result so far: 6.0
Subtract 378 from 400 to get 22.
Include the next digit (4) from the dividend after 22, then repeat: 224 / 63

Moving on to step 4:
If we divide 224 by 63, we get 3 and a remainder of 35.
The next digit of our result is 3. 
Result so far: 63.0
Subtract 189 from 224 to get 35.
Append the next digit (0) from the dividend to 35 and continue with: 350 / 63

Going ahead to step 5:
If we divide 350 by 63, we get 5 and a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 635.0
Deduct 315 from 350 and we're left with 35.
Fetch the next digit (1) from the dividend, attach it to 35 and continue: 351 / 63

Moving on to step 6:
If we divide 351 by 63, we get 5 and a remainder of 36.
Put 5 as the next digit of the answer. 
Result so far: 6355.0
If we take 315 away from 351, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 7:
When dividing 360 by 63, we get 5 with a remainder of 45.
Put 5 as the next digit of the answer. 
Result so far: 6355.5
If we take 315 away from 360, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 8:
63 can be fit into 450 7 times, resulting in a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 6355.57
Subtract 441 from 450 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 9:
63 goes into 90 1 times with a remainder of 27.
Record the quotient 1 as the next digit in the result. 
Result so far: 6355.571
Subtracting 63 from 90 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 10:
270 divided by 63 is 4 with a remainder of 18.
Put 4 as the next digit of the answer. 
Result so far: 6355.5714
If we subtract 252 from 270, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 11:
63 goes into 180 2 times with a remainder of 54.
The next digit of our result is 2. 
Result so far: 6355.57142
Subtracting 126 from 180 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 12:
540 divided by 63 is 8 with a remainder of 36.
The next digit of our result is 8. 
Result so far: 6355.571428
Subtract 504 from 540 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 13:
360 divided by 63 is 5 with a remainder of 45.
Put 5 as the next digit of the answer. 
Result so far: 6355.5714285
Subtract 315 from 360 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 14:
If we divide 450 by 63, we get 7 and a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 6355.57142857
Subtract 441 from 450 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

The final result is 6355.57142857 with a remainder of 9e-09.