We look at the division of 99121304 by 958 
We're looking to find how many times 958 goes into 99121304.

Moving on to step 1:
9 divided by 958 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 958

Let's proceed to step 2:
958 can be fit into 99 0 times, resulting in a remainder of 99.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 99 leaves us with 99.
Include the next digit (1) from the dividend after 99, then repeat: 991 / 958

Moving on to step 3:
958 can be fit into 991 1 times, resulting in a remainder of 33.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 958 from 991 leaves us with 33.
Append the next digit (2) from the dividend to 33 and continue with: 332 / 958

Going ahead to step 4:
When dividing 332 by 958, we get 0 with a remainder of 332.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Subtracting 0 from 332 leaves us with 332.
Take the next digit (1) from the dividend and append it to 332, then repeat: 3321 / 958

Moving on to step 5:
3321 divided by 958 is 3 with a remainder of 447.
The number 3 becomes the next digit in our result. 
Result so far: 103.0
If we subtract 2874 from 3321, we get 447.
Bring next digit (3) of the dividend behind the 447 and repeat the process: 4473 / 958

On to step 6:
4473 divided by 958 is 4 with a remainder of 641.
The next digit of our result is 4. 
Result so far: 1034.0
Deduct 3832 from 4473 and we're left with 641.
Take the next digit (0) from the dividend and append it to 641, then repeat: 6410 / 958

Moving on to step 7:
958 can be fit into 6410 6 times, resulting in a remainder of 662.
Put 6 as the next digit of the answer. 
Result so far: 10346.0
If we take 5748 away from 6410, we end up with 662.
Append the next digit (4) from the dividend to 662 and continue with: 6624 / 958

Let's proceed to step 8:
958 can be fit into 6624 6 times, resulting in a remainder of 876.
Use 6 as the next digit of our solution. 
Result so far: 103466.0
Deduct 5748 from 6624 and we're left with 876.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8760, and continue the process.

Advancing to step 9:
When dividing 8760 by 958, we get 9 with a remainder of 138.
Record the quotient 9 as the next digit in the result. 
Result so far: 103466.9
Subtracting 8622 from 8760 leaves us with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Moving on to step 10:
958 goes into 1380 1 times with a remainder of 422.
Put 1 as the next digit of the answer. 
Result so far: 103466.91
The remainder is 422 after subtracting 958 from 1380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4220, and continue the process.

Moving on to step 11:
If we divide 4220 by 958, we get 4 and a remainder of 388.
Record the quotient 4 as the next digit in the result. 
Result so far: 103466.914
If we take 3832 away from 4220, we end up with 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

Going ahead to step 12:
The number 958 fits into 3880 4 times, leaving a remainder of 48.
Write down 4 as next digit of the result. 
Result so far: 103466.9144
The remainder is 48 after subtracting 3832 from 3880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final outcome is 103466.9144, with a leftover of 0.00048.