We divide 360390 by 87
Let's see how many times 87 fits into 360390.

Advancing to step 1:
If we divide 3 by 87, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 87

Moving on to step 2:
When dividing 36 by 87, we get 0 with a remainder of 36.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 36 and we're left with 36.
Bring next digit (0) of the dividend behind the 36 and repeat the process: 360 / 87

Going ahead to step 3:
87 goes into 360 4 times with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 348 from 360 and we're left with 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 87

Let's proceed to step 4:
The number 87 fits into 123 1 times, leaving a remainder of 36.
Record the quotient 1 as the next digit in the result. 
Result so far: 41.0
Deduct 87 from 123 and we're left with 36.
Take the next digit (9) from the dividend and append it to 36, then repeat: 369 / 87

Step 5:
87 can be fit into 369 4 times, resulting in a remainder of 21.
Record the quotient 4 as the next digit in the result. 
Result so far: 414.0
Deduct 348 from 369 and we're left with 21.
Append the next digit (0) from the dividend to 21 and continue with: 210 / 87

Advancing to step 6:
The number 87 fits into 210 2 times, leaving a remainder of 36.
The number 2 becomes the next digit in our result. 
Result so far: 4142.0
The remainder is 36 after subtracting 174 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 7:
If we divide 360 by 87, we get 4 and a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 4142.4
The remainder is 12 after subtracting 348 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 8:
87 can be fit into 120 1 times, resulting in a remainder of 33.
The next digit of our result is 1. 
Result so far: 4142.41
If we take 87 away from 120, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Moving on to step 9:
When dividing 330 by 87, we get 3 with a remainder of 69.
Put 3 as the next digit of the answer. 
Result so far: 4142.413
The remainder is 69 after subtracting 261 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Going ahead to step 10:
87 can be fit into 690 7 times, resulting in a remainder of 81.
Put 7 as the next digit of the answer. 
Result so far: 4142.4137
The remainder is 81 after subtracting 609 from 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Let's proceed to step 11:
87 can be fit into 810 9 times, resulting in a remainder of 27.
Record the quotient 9 as the next digit in the result. 
Result so far: 4142.41379
If we subtract 783 from 810, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Moving on to step 12:
270 divided by 87 is 3 with a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 4142.413793
The remainder is 9 after subtracting 261 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 13:
The number 87 fits into 90 1 times, leaving a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 4142.4137931
Subtract 87 from 90 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 14:
87 goes into 30 0 times with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 4142.4137931
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final result is 4142.4137931 with a remainder of 3e-08.