We're dividing 87145391 by 438 
We're looking to find how many times 438 goes into 87145391.

Let's proceed to step 1:
8 divided by 438 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 438

Moving on to step 2:
438 can be fit into 87 0 times, resulting in a remainder of 87.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 87 after subtracting 0 from 87.
Bring next digit (1) of the dividend behind the 87 and repeat the process: 871 / 438

Going ahead to step 3:
The number 438 fits into 871 1 times, leaving a remainder of 433.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 438 from 871 to get 433.
Bring next digit (4) of the dividend behind the 433 and repeat the process: 4334 / 438

On to step 4:
438 goes into 4334 9 times with a remainder of 392.
Put 9 as the next digit of the answer. 
Result so far: 19.0
The remainder is 392 after subtracting 3942 from 4334.
Append the next digit (5) from the dividend to 392 and continue with: 3925 / 438

Going ahead to step 5:
The number 438 fits into 3925 8 times, leaving a remainder of 421.
Record the quotient 8 as the next digit in the result. 
Result so far: 198.0
Subtracting 3504 from 3925 leaves us with 421.
Grab the next digit (3) from the dividend, add it to 421, then carry on: 4213 / 438

Let's proceed to step 6:
4213 divided by 438 is 9 with a remainder of 271.
Use 9 as the next digit of our solution. 
Result so far: 1989.0
Subtracting 3942 from 4213 leaves us with 271.
Grab the next digit (9) from the dividend, add it to 271, then carry on: 2719 / 438

Moving on to step 7:
If we divide 2719 by 438, we get 6 and a remainder of 91.
The next digit of our result is 6. 
Result so far: 19896.0
If we subtract 2628 from 2719, we get 91.
Take the next digit (1) from the dividend and append it to 91, then repeat: 911 / 438

Step 8:
438 can be fit into 911 2 times, resulting in a remainder of 35.
Use 2 as the next digit of our solution. 
Result so far: 198962.0
The remainder is 35 after subtracting 876 from 911.
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 9:
438 can be fit into 350 0 times, resulting in a remainder of 350.
The next digit of our result is 0. 
Result so far: 198962.0
Deduct 0 from 350 and we're left with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Going ahead to step 10:
438 can be fit into 3500 7 times, resulting in a remainder of 434.
Record the quotient 7 as the next digit in the result. 
Result so far: 198962.07
The remainder is 434 after subtracting 3066 from 3500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4340, and continue the process.

Let's proceed to step 11:
The number 438 fits into 4340 9 times, leaving a remainder of 398.
Write down 9 as next digit of the result. 
Result so far: 198962.079
Subtract 3942 from 4340 to get 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Let's proceed to step 12:
3980 divided by 438 is 9 with a remainder of 38.
Put 9 as the next digit of the answer. 
Result so far: 198962.0799
Deduct 3942 from 3980 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

The final outcome is 198962.0799, with a leftover of 0.00038.