9990399 ÷ 953 
Let's see how many times 953 fits into 9990399.

Step 1:
953 can be fit into 9 0 times, resulting in a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 953

Advancing to step 2:
If we divide 99 by 953, we get 0 and a remainder of 99.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 99 and we're left with 99.
Take the next digit (9) from the dividend and append it to 99, then repeat: 999 / 953

Advancing to step 3:
953 can be fit into 999 1 times, resulting in a remainder of 46.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 953 from 999, we get 46.
Take the next digit (0) from the dividend and append it to 46, then repeat: 460 / 953

Going ahead to step 4:
The number 953 fits into 460 0 times, leaving a remainder of 460.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Deduct 0 from 460 and we're left with 460.
Take the next digit (3) from the dividend and append it to 460, then repeat: 4603 / 953

On to step 5:
4603 divided by 953 is 4 with a remainder of 791.
Put 4 as the next digit of the answer. 
Result so far: 104.0
Deduct 3812 from 4603 and we're left with 791.
Include the next digit (9) from the dividend after 791, then repeat: 7919 / 953

Advancing to step 6:
When dividing 7919 by 953, we get 8 with a remainder of 295.
The number 8 becomes the next digit in our result. 
Result so far: 1048.0
If we take 7624 away from 7919, we end up with 295.
Fetch the next digit (9) from the dividend, attach it to 295 and continue: 2959 / 953

Advancing to step 7:
2959 divided by 953 is 3 with a remainder of 100.
The next digit of our result is 3. 
Result so far: 10483.0
If we subtract 2859 from 2959, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 8:
953 goes into 1000 1 times with a remainder of 47.
Write down 1 as next digit of the result. 
Result so far: 10483.1
Subtracting 953 from 1000 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Advancing to step 9:
953 goes into 470 0 times with a remainder of 470.
Write down 0 as next digit of the result. 
Result so far: 10483.1
The remainder is 470 after subtracting 0 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Moving on to step 10:
The number 953 fits into 4700 4 times, leaving a remainder of 888.
The next digit of our result is 4. 
Result so far: 10483.104
The remainder is 888 after subtracting 3812 from 4700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8880, and continue the process.

On to step 11:
If we divide 8880 by 953, we get 9 and a remainder of 303.
Write down 9 as next digit of the result. 
Result so far: 10483.1049
Subtract 8577 from 8880 to get 303.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

Let's proceed to step 12:
3030 divided by 953 is 3 with a remainder of 171.
The number 3 becomes the next digit in our result. 
Result so far: 10483.10493
The remainder is 171 after subtracting 2859 from 3030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

Moving on to step 13:
If we divide 1710 by 953, we get 1 and a remainder of 757.
The number 1 becomes the next digit in our result. 
Result so far: 10483.104931
If we take 953 away from 1710, we end up with 757.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7570, and continue the process.

Moving on to step 14:
If we divide 7570 by 953, we get 7 and a remainder of 899.
Use 7 as the next digit of our solution. 
Result so far: 10483.1049317
Subtracting 6671 from 7570 leaves us with 899.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8990, and continue the process.

Advancing to step 15:
If we divide 8990 by 953, we get 9 and a remainder of 413.
Record the quotient 9 as the next digit in the result. 
Result so far: 10483.10493179
The remainder is 413 after subtracting 8577 from 8990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4130, and continue the process.

After the division, we end up with 10483.10493179 and a remainder of 4.13e-07.