We look at the division of 43189989 by 435 
We want to figure out the number of times 43189989 can be divided by 435.

Going ahead to step 1:
435 can be fit into 4 0 times, resulting in a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 435

Advancing to step 2:
435 can be fit into 43 0 times, resulting in a remainder of 43.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 43, we get 43.
Append the next digit (1) from the dividend to 43 and continue with: 431 / 435

Let's proceed to step 3:
431 divided by 435 is 0 with a remainder of 431.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 431, we get 431.
Fetch the next digit (8) from the dividend, attach it to 431 and continue: 4318 / 435

Advancing to step 4:
435 goes into 4318 9 times with a remainder of 403.
The next digit of our result is 9. 
Result so far: 9.0
Subtract 3915 from 4318 to get 403.
Append the next digit (9) from the dividend to 403 and continue with: 4039 / 435

On to step 5:
When dividing 4039 by 435, we get 9 with a remainder of 124.
Write down 9 as next digit of the result. 
Result so far: 99.0
The remainder is 124 after subtracting 3915 from 4039.
Append the next digit (9) from the dividend to 124 and continue with: 1249 / 435

Step 6:
1249 divided by 435 is 2 with a remainder of 379.
Record the quotient 2 as the next digit in the result. 
Result so far: 992.0
Subtracting 870 from 1249 leaves us with 379.
Grab the next digit (8) from the dividend, add it to 379, then carry on: 3798 / 435

Moving on to step 7:
The number 435 fits into 3798 8 times, leaving a remainder of 318.
The next digit of our result is 8. 
Result so far: 9928.0
Deduct 3480 from 3798 and we're left with 318.
Take the next digit (9) from the dividend and append it to 318, then repeat: 3189 / 435

Let's proceed to step 8:
The number 435 fits into 3189 7 times, leaving a remainder of 144.
The number 7 becomes the next digit in our result. 
Result so far: 99287.0
Subtracting 3045 from 3189 leaves us with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Moving on to step 9:
The number 435 fits into 1440 3 times, leaving a remainder of 135.
Use 3 as the next digit of our solution. 
Result so far: 99287.3
If we subtract 1305 from 1440, we get 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Moving on to step 10:
435 goes into 1350 3 times with a remainder of 45.
The number 3 becomes the next digit in our result. 
Result so far: 99287.33
If we subtract 1305 from 1350, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

The final outcome is 99287.33, with a leftover of 0.045.