990420 ÷ 23 
We want to figure out the number of times 990420 can be divided by 23.

Step 1:
23 can be fit into 9 0 times, resulting in a remainder of 9.
Record the quotient 0 as the next digit in the result. 
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 / 23

Moving on to step 2:
The number 23 fits into 99 4 times, leaving a remainder of 7.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 7 after subtracting 92 from 99.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 23

Advancing to step 3:
If we divide 70 by 23, we get 3 and a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
Deduct 69 from 70 and we're left with 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 23

Advancing to step 4:
The number 23 fits into 14 0 times, leaving a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 430.0
If we subtract 0 from 14, we get 14.
Include the next digit (2) from the dividend after 14, then repeat: 142 / 23

Moving on to step 5:
23 goes into 142 6 times with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 4306.0
If we subtract 138 from 142, we get 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 23

Advancing to step 6:
When dividing 40 by 23, we get 1 with a remainder of 17.
Record the quotient 1 as the next digit in the result. 
Result so far: 43061.0
Deduct 23 from 40 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 7:
23 can be fit into 170 7 times, resulting in a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 43061.7
The remainder is 9 after subtracting 161 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 8:
The number 23 fits into 90 3 times, leaving a remainder of 21.
Write down 3 as next digit of the result. 
Result so far: 43061.73
Subtract 69 from 90 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 9:
210 divided by 23 is 9 with a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 43061.739
Subtract 207 from 210 to 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.

Let's proceed to step 10:
30 divided by 23 is 1 with a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 43061.7391
Subtracting 23 from 30 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 11:
If we divide 70 by 23, we get 3 and a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 43061.73913
Subtracting 69 from 70 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 12:
If we divide 10 by 23, we get 0 and a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 43061.73913
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 13:
23 can be fit into 100 4 times, resulting in a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 43061.7391304
If we take 92 away from 100, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 14:
If we divide 80 by 23, we get 3 and a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 43061.73913043
Subtracting 69 from 80 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

The quotient of the division is 43061.73913043, and the remainder is 1.1e-08.