We divide 389603 by 87
The aim is to understand the frequency of 87 in 389603.

Going ahead to step 1:
87 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 87

Step 2:
38 divided by 87 is 0 with a remainder of 38.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 38, we end up with 38.
Take the next digit (9) from the dividend and append it to 38, then repeat: 389 / 87

On to step 3:
389 divided by 87 is 4 with a remainder of 41.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 41 after subtracting 348 from 389.
Grab the next digit (6) from the dividend, add it to 41, then carry on: 416 / 87

On to step 4:
416 divided by 87 is 4 with a remainder of 68.
Record the quotient 4 as the next digit in the result. 
Result so far: 44.0
If we subtract 348 from 416, we get 68.
Append the next digit (0) from the dividend to 68 and continue with: 680 / 87

On to step 5:
The number 87 fits into 680 7 times, leaving a remainder of 71.
The number 7 becomes the next digit in our result. 
Result so far: 447.0
The remainder is 71 after subtracting 609 from 680.
Append the next digit (3) from the dividend to 71 and continue with: 713 / 87

Step 6:
87 can be fit into 713 8 times, resulting in a remainder of 17.
The number 8 becomes the next digit in our result. 
Result so far: 4478.0
Subtracting 696 from 713 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 7:
87 goes into 170 1 times with a remainder of 83.
Use 1 as the next digit of our solution. 
Result so far: 4478.1
The remainder is 83 after subtracting 87 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Going ahead to step 8:
If we divide 830 by 87, we get 9 and a remainder of 47.
Record the quotient 9 as the next digit in the result. 
Result so far: 4478.19
Subtracting 783 from 830 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on to step 9:
470 divided by 87 is 5 with a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 4478.195
Subtract 435 from 470 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 10:
350 divided by 87 is 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 4478.1954
If we take 348 away from 350, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 11:
When dividing 20 by 87, we get 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 4478.1954
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 12:
87 can be fit into 200 2 times, resulting in a remainder of 26.
Put 2 as the next digit of the answer. 
Result so far: 4478.195402
The remainder is 26 after subtracting 174 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 13:
87 goes into 260 2 times with a remainder of 86.
The next digit of our result is 2. 
Result so far: 4478.1954022
If we subtract 174 from 260, we get 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

In conclusion, the division gives 4478.1954022 with a balance of 8.6e-07.