400303 ÷ 84 
We want to figure out the number of times 400303 can be divided by 84.

On to step 1:
84 goes into 4 0 times with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 84

On to step 2:
84 goes into 40 0 times with a remainder of 40.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 40 after subtracting 0 from 40.
Bring next digit (0) of the dividend behind the 40 and repeat the process: 400 / 84

Let's proceed to step 3:
84 can be fit into 400 4 times, resulting in a remainder of 64.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtract 336 from 400 to get 64.
Fetch the next digit (3) from the dividend, attach it to 64 and continue: 643 / 84

Step 4:
When dividing 643 by 84, we get 7 with a remainder of 55.
Write down 7 as next digit of the result. 
Result so far: 47.0
If we subtract 588 from 643, we get 55.
Take the next digit (0) from the dividend and append it to 55, then repeat: 550 / 84

Advancing to step 5:
84 can be fit into 550 6 times, resulting in a remainder of 46.
The number 6 becomes the next digit in our result. 
Result so far: 476.0
Subtract 504 from 550 to get 46.
Append the next digit (3) from the dividend to 46 and continue with: 463 / 84

On to step 6:
If we divide 463 by 84, we get 5 and a remainder of 43.
The next digit of our result is 5. 
Result so far: 4765.0
If we subtract 420 from 463, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 7:
When dividing 430 by 84, we get 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 4765.5
Deduct 420 from 430 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
The number 84 fits into 100 1 times, leaving a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 4765.51
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 9:
If we divide 160 by 84, we get 1 and a remainder of 76.
Put 1 as the next digit of the answer. 
Result so far: 4765.511
If we subtract 84 from 160, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

After the division, we end up with 4765.511 and a remainder of 0.0076.