351353 divided by 87 
The aim is to understand the frequency of 87 in 351353.

Let's proceed to step 1:
87 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 87

Advancing to step 2:
When dividing 35 by 87, we get 0 with a remainder of 35.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 35 leaves us with 35.
Append the next digit (1) from the dividend to 35 and continue with: 351 / 87

Advancing to step 3:
If we divide 351 by 87, we get 4 and a remainder of 3.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 348 away from 351, we end up with 3.
Take the next digit (3) from the dividend and append it to 3, then repeat: 33 / 87

On to step 4:
87 can be fit into 33 0 times, resulting in a remainder of 33.
The next digit of our result is 0. 
Result so far: 40.0
Deduct 0 from 33 and we're left with 33.
Bring next digit (5) of the dividend behind the 33 and repeat the process: 335 / 87

Step 5:
When dividing 335 by 87, we get 3 with a remainder of 74.
Write down 3 as next digit of the result. 
Result so far: 403.0
The remainder is 74 after subtracting 261 from 335.
Take the next digit (3) from the dividend and append it to 74, then repeat: 743 / 87

Let's proceed to step 6:
743 divided by 87 is 8 with a remainder of 47.
Write down 8 as next digit of the result. 
Result so far: 4038.0
If we subtract 696 from 743, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 7:
87 can be fit into 470 5 times, resulting in a remainder of 35.
The next digit of our result is 5. 
Result so far: 4038.5
Subtracting 435 from 470 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 8:
87 can be fit into 350 4 times, resulting in a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 4038.54
Subtract 348 from 350 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 9:
The number 87 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 4038.54
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.

On to step 10:
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: 4038.5402
If we subtract 174 from 200, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 11:
The number 87 fits into 260 2 times, leaving a remainder of 86.
Record the quotient 2 as the next digit in the result. 
Result so far: 4038.54022
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.

The final outcome is 4038.54022, with a leftover of 8.6e-05.