We look at the division of 43790991 by 4 
Let's see how many times 4 fits into 43790991.

Let's proceed to step 1:
4 can be fit into 4 1 times, resulting in a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 4 away from 4, we end up with 0.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 4

Advancing to step 2:
4 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (7) from the dividend after 3, then repeat: 37 / 4

Advancing to step 3:
When dividing 37 by 4, we get 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 109.0
Subtracting 36 from 37 leaves us with 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 4

Let's proceed to step 4:
4 goes into 19 4 times with a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 1094.0
Subtracting 16 from 19 leaves us with 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 4

Step 5:
The number 4 fits into 30 7 times, leaving a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 10947.0
Subtracting 28 from 30 leaves us with 2.
Include the next digit (9) from the dividend after 2, then repeat: 29 / 4

Moving on to step 6:
When dividing 29 by 4, we get 7 with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 109477.0
Deduct 28 from 29 and we're left with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 4

Going ahead to step 7:
4 goes into 19 4 times with a remainder of 3.
Put 4 as the next digit of the answer. 
Result so far: 1094774.0
Subtracting 16 from 19 leaves us with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 4

Advancing to step 8:
When dividing 31 by 4, we get 7 with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 10947747.0
If we subtract 28 from 31, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 9:
If we divide 30 by 4, we get 7 and a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 10947747.7
Deduct 28 from 30 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 10:
When dividing 20 by 4, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 10947747.75
If we take 20 away from 20, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
4 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 10947747.75
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 12:
4 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10947747.75
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 10947747.75, with a leftover of 0.0.