10358923 ÷ 800 
Let's see how many times 800 fits into 10358923.

Advancing to step 1:
The number 800 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 800

Advancing to step 2:
The number 800 fits into 10 0 times, leaving a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 10 to get 10.
Append the next digit (3) from the dividend to 10 and continue with: 103 / 800

Let's proceed to step 3:
103 divided by 800 is 0 with a remainder of 103.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 103 and we're left with 103.
Append the next digit (5) from the dividend to 103 and continue with: 1035 / 800

Going ahead to step 4:
800 can be fit into 1035 1 times, resulting in a remainder of 235.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 800 from 1035 leaves us with 235.
Fetch the next digit (8) from the dividend, attach it to 235 and continue: 2358 / 800

On to step 5:
2358 divided by 800 is 2 with a remainder of 758.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
If we subtract 1600 from 2358, we get 758.
Append the next digit (9) from the dividend to 758 and continue with: 7589 / 800

Moving on to step 6:
7589 divided by 800 is 9 with a remainder of 389.
The next digit of our result is 9. 
Result so far: 129.0
Subtracting 7200 from 7589 leaves us with 389.
Fetch the next digit (2) from the dividend, attach it to 389 and continue: 3892 / 800

Step 7:
800 goes into 3892 4 times with a remainder of 692.
Record the quotient 4 as the next digit in the result. 
Result so far: 1294.0
Subtract 3200 from 3892 to get 692.
Include the next digit (3) from the dividend after 692, then repeat: 6923 / 800

On to step 8:
6923 divided by 800 is 8 with a remainder of 523.
The next digit of our result is 8. 
Result so far: 12948.0
If we take 6400 away from 6923, we end up with 523.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5230, and continue the process.

Step 9:
5230 divided by 800 is 6 with a remainder of 430.
The next digit of our result is 6. 
Result so far: 12948.6
Deduct 4800 from 5230 and we're left with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

On to step 10:
If we divide 4300 by 800, we get 5 and a remainder of 300.
Record the quotient 5 as the next digit in the result. 
Result so far: 12948.65
If we subtract 4000 from 4300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Let's proceed to step 11:
3000 divided by 800 is 3 with a remainder of 600.
Use 3 as the next digit of our solution. 
Result so far: 12948.653
The remainder is 600 after subtracting 2400 from 3000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Going ahead to step 12:
800 goes into 6000 7 times with a remainder of 400.
Use 7 as the next digit of our solution. 
Result so far: 12948.6537
If we subtract 5600 from 6000, we get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Moving on to step 13:
4000 divided by 800 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 12948.65375
Deduct 4000 from 4000 and we're left 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.

Going ahead to step 14:
800 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 12948.65375
Deduct 0 from 0 and we're left 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.

Let's proceed to step 15:
When dividing 0 by 800, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 12948.65375
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 12948.65375 and a remainder of 0.0.