87071260 ÷ 438 
The aim is to understand the frequency of 438 in 87071260.

Going ahead to step 1:
When dividing 8 by 438, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 438

Moving on to step 2:
The number 438 fits into 87 0 times, leaving a remainder of 87.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 87, we end up with 87.
Append the next digit (0) from the dividend to 87 and continue with: 870 / 438

Going ahead to step 3:
438 goes into 870 1 times with a remainder of 432.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 438 from 870 leaves us with 432.
Take the next digit (7) from the dividend and append it to 432, then repeat: 4327 / 438

Step 4:
438 can be fit into 4327 9 times, resulting in a remainder of 385.
Put 9 as the next digit of the answer. 
Result so far: 19.0
Subtract 3942 from 4327 to get 385.
Bring next digit (1) of the dividend behind the 385 and repeat the process: 3851 / 438

Moving on to step 5:
438 goes into 3851 8 times with a remainder of 347.
The number 8 becomes the next digit in our result. 
Result so far: 198.0
Subtracting 3504 from 3851 leaves us with 347.
Append the next digit (2) from the dividend to 347 and continue with: 3472 / 438

Going ahead to step 6:
If we divide 3472 by 438, we get 7 and a remainder of 406.
Write down 7 as next digit of the result. 
Result so far: 1987.0
If we take 3066 away from 3472, we end up with 406.
Fetch the next digit (6) from the dividend, attach it to 406 and continue: 4066 / 438

Advancing to step 7:
438 can be fit into 4066 9 times, resulting in a remainder of 124.
Put 9 as the next digit of the answer. 
Result so far: 19879.0
If we take 3942 away from 4066, we end up with 124.
Include the next digit (0) from the dividend after 124, then repeat: 1240 / 438

On to step 8:
When dividing 1240 by 438, we get 2 with a remainder of 364.
Write down 2 as next digit of the result. 
Result so far: 198792.0
The remainder is 364 after subtracting 876 from 1240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

Step 9:
438 goes into 3640 8 times with a remainder of 136.
Write down 8 as next digit of the result. 
Result so far: 198792.8
Deduct 3504 from 3640 and we're left with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Let's proceed to step 10:
When dividing 1360 by 438, we get 3 with a remainder of 46.
Put 3 as the next digit of the answer. 
Result so far: 198792.83
If we take 1314 away from 1360, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 11:
438 goes into 460 1 times with a remainder of 22.
The number 1 becomes the next digit in our result. 
Result so far: 198792.831
If we take 438 away from 460, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 12:
438 goes into 220 0 times with a remainder of 220.
Write down 0 as next digit of the result. 
Result so far: 198792.831
Subtract 0 from 220 to get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Step 13:
438 goes into 2200 5 times with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 198792.83105
If we subtract 2190 from 2200, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 14:
If we divide 100 by 438, we get 0 and a remainder of 100.
Use 0 as the next digit of our solution. 
Result so far: 198792.83105
The remainder is 100 after subtracting 0 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Let's proceed to step 15:
438 can be fit into 1000 2 times, resulting in a remainder of 124.
The next digit of our result is 2. 
Result so far: 198792.8310502
Subtracting 876 from 1000 leaves us with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Let's proceed to step 16:
If we divide 1240 by 438, we get 2 and a remainder of 364.
Record the quotient 2 as the next digit in the result. 
Result so far: 198792.83105022
If we take 876 away from 1240, we end up with 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

The final outcome is 198792.83105022, with a leftover of 3.64e-07.