399575 ÷ 73 
Our goal is to divide 399575 by 73.

Step 1:
When dividing 3 by 73, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 73

On to step 2:
73 can be fit into 39 0 times, resulting in a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Include the next digit (9) from the dividend after 39, then repeat: 399 / 73

Going ahead to step 3:
The number 73 fits into 399 5 times, leaving a remainder of 34.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we take 365 away from 399, we end up with 34.
Include the next digit (5) from the dividend after 34, then repeat: 345 / 73

Moving on to step 4:
73 can be fit into 345 4 times, resulting in a remainder of 53.
The number 4 becomes the next digit in our result. 
Result so far: 54.0
Deduct 292 from 345 and we're left with 53.
Bring next digit (7) of the dividend behind the 53 and repeat the process: 537 / 73

Let's proceed to step 5:
If we divide 537 by 73, we get 7 and a remainder of 26.
Put 7 as the next digit of the answer. 
Result so far: 547.0
If we subtract 511 from 537, we get 26.
Take the next digit (5) from the dividend and append it to 26, then repeat: 265 / 73

Going ahead to step 6:
When dividing 265 by 73, we get 3 with a remainder of 46.
Put 3 as the next digit of the answer. 
Result so far: 5473.0
If we subtract 219 from 265, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 7:
460 divided by 73 is 6 with a remainder of 22.
Record the quotient 6 as the next digit in the result. 
Result so far: 5473.6
If we subtract 438 from 460, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 8:
The number 73 fits into 220 3 times, leaving a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 5473.63
If we subtract 219 from 220, 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.

Step 9:
73 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 5473.63
If we take 0 away from 10, we end up 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 10:
When dividing 100 by 73, we get 1 with a remainder of 27.
Write down 1 as next digit of the result. 
Result so far: 5473.6301
The remainder is 27 after subtracting 73 from 100.
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 11:
The number 73 fits into 270 3 times, leaving a remainder of 51.
Use 3 as the next digit of our solution. 
Result so far: 5473.63013
Subtract 219 from 270 to get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 12:
If we divide 510 by 73, we get 6 and a remainder of 72.
Write down 6 as next digit of the result. 
Result so far: 5473.630136
If we subtract 438 from 510, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 13:
73 goes into 720 9 times with a remainder of 63.
The next digit of our result is 9. 
Result so far: 5473.6301369
If we subtract 657 from 720, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Advancing to step 14:
73 goes into 630 8 times with a remainder of 46.
Use 8 as the next digit of our solution. 
Result so far: 5473.63013698
The remainder is 46 after subtracting 584 from 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

The final outcome is 5473.63013698, with a leftover of 4.6e-08.