405280 divided by 87 
Our goal is to divide 405280 by 87.

On to step 1:
The number 87 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
Deduct 0 from 4 and we're left with 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 87

On to step 2:
The number 87 fits into 40 0 times, leaving a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 40 leaves us with 40.
Append the next digit (5) from the dividend to 40 and continue with: 405 / 87

Let's proceed to step 3:
87 goes into 405 4 times with a remainder of 57.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 348 from 405, we get 57.
Fetch the next digit (2) from the dividend, attach it to 57 and continue: 572 / 87

Step 4:
The number 87 fits into 572 6 times, leaving a remainder of 50.
Record the quotient 6 as the next digit in the result. 
Result so far: 46.0
Subtract 522 from 572 to get 50.
Include the next digit (8) from the dividend after 50, then repeat: 508 / 87

Advancing to step 5:
When dividing 508 by 87, we get 5 with a remainder of 73.
Put 5 as the next digit of the answer. 
Result so far: 465.0
The remainder is 73 after subtracting 435 from 508.
Take the next digit (0) from the dividend and append it to 73, then repeat: 730 / 87

Step 6:
If we divide 730 by 87, we get 8 and a remainder of 34.
Record the quotient 8 as the next digit in the result. 
Result so far: 4658.0
If we subtract 696 from 730, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 7:
87 goes into 340 3 times with a remainder of 79.
The next digit of our result is 3. 
Result so far: 4658.3
Subtract 261 from 340 to get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Step 8:
If we divide 790 by 87, we get 9 and a remainder of 7.
The next digit of our result is 9. 
Result so far: 4658.39
If we subtract 783 from 790, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 9:
70 divided by 87 is 0 with a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 4658.39
If we subtract 0 from 70, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 10:
87 can be fit into 700 8 times, resulting in a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 4658.3908
Subtracting 696 from 700 leaves us 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.

Step 11:
40 divided by 87 is 0 with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 4658.3908
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 12:
When dividing 400 by 87, we get 4 with a remainder of 52.
The next digit of our result is 4. 
Result so far: 4658.390804
Deduct 348 from 400 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 13:
87 can be fit into 520 5 times, resulting in a remainder of 85.
Record the quotient 5 as the next digit in the result. 
Result so far: 4658.3908045
Deduct 435 from 520 and we're left with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Step 14:
87 can be fit into 850 9 times, resulting in a remainder of 67.
The number 9 becomes the next digit in our result. 
Result so far: 4658.39080459
Subtract 783 from 850 to get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

The final outcome is 4658.39080459, with a leftover of 6.7e-08.