75112489 ÷ 438 
We want to divide 75112489 by 438.

On to step 1:
If we divide 7 by 438, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (5) from the dividend, attach it to 7 and continue: 75 / 438

Step 2:
438 goes into 75 0 times with a remainder of 75.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 75 to get 75.
Take the next digit (1) from the dividend and append it to 75, then repeat: 751 / 438

Step 3:
When dividing 751 by 438, we get 1 with a remainder of 313.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 438 from 751 leaves us with 313.
Include the next digit (1) from the dividend after 313, then repeat: 3131 / 438

On to step 4:
If we divide 3131 by 438, we get 7 and a remainder of 65.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
Deduct 3066 from 3131 and we're left with 65.
Fetch the next digit (2) from the dividend, attach it to 65 and continue: 652 / 438

Let's proceed to step 5:
If we divide 652 by 438, we get 1 and a remainder of 214.
Write down 1 as next digit of the result. 
Result so far: 171.0
If we subtract 438 from 652, we get 214.
Append the next digit (4) from the dividend to 214 and continue with: 2144 / 438

Moving on to step 6:
2144 divided by 438 is 4 with a remainder of 392.
The next digit of our result is 4. 
Result so far: 1714.0
If we take 1752 away from 2144, we end up with 392.
Grab the next digit (8) from the dividend, add it to 392, then carry on: 3928 / 438

Going ahead to step 7:
If we divide 3928 by 438, we get 8 and a remainder of 424.
Write down 8 as next digit of the result. 
Result so far: 17148.0
If we take 3504 away from 3928, we end up with 424.
Take the next digit (9) from the dividend and append it to 424, then repeat: 4249 / 438

Advancing to step 8:
438 can be fit into 4249 9 times, resulting in a remainder of 307.
The number 9 becomes the next digit in our result. 
Result so far: 171489.0
If we subtract 3942 from 4249, we get 307.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3070, and continue the process.

Let's proceed to step 9:
The number 438 fits into 3070 7 times, leaving a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 171489.7
Subtracting 3066 from 3070 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 10:
40 divided by 438 is 0 with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 171489.7
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 11:
438 goes into 400 0 times with a remainder of 400.
Record the quotient 0 as the next digit in the result. 
Result so far: 171489.7
If we take 0 away from 400, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final outcome is 171489.7, with a leftover of 0.04.