36023523 divided by 21 
We want to figure out the number of times 36023523 can be divided by 21.

On to step 1:
When dividing 3 by 21, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (6) from the dividend after 3, then repeat: 36 / 21

Moving on to step 2:
36 divided by 21 is 1 with a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 21 away from 36, we end up with 15.
Include the next digit (0) from the dividend after 15, then repeat: 150 / 21

On to step 3:
The number 21 fits into 150 7 times, leaving a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 17.0
Deduct 147 from 150 and we're left with 3.
Grab the next digit (2) from the dividend, add it to 3, then carry on: 32 / 21

Advancing to step 4:
The number 21 fits into 32 1 times, leaving a remainder of 11.
Write down 1 as next digit of the result. 
Result so far: 171.0
Deduct 21 from 32 and we're left with 11.
Bring next digit (3) of the dividend behind the 11 and repeat the process: 113 / 21

Step 5:
If we divide 113 by 21, we get 5 and a remainder of 8.
Record the quotient 5 as the next digit in the result. 
Result so far: 1715.0
Subtract 105 from 113 to get 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 21

Advancing to step 6:
The number 21 fits into 85 4 times, leaving a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 17154.0
Deduct 84 from 85 and we're left with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 21

Moving on to step 7:
If we divide 12 by 21, we get 0 and a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 171540.0
Subtract 0 from 12 to get 12.
Append the next digit (3) from the dividend to 12 and continue with: 123 / 21

Step 8:
21 can be fit into 123 5 times, resulting in a remainder of 18.
Use 5 as the next digit of our solution. 
Result so far: 1715405.0
Subtract 105 from 123 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 9:
21 can be fit into 180 8 times, resulting in a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 1715405.8
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 10:
120 divided by 21 is 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 1715405.85
If we take 105 away from 120, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 11:
21 can be fit into 150 7 times, resulting in a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 1715405.857
If we subtract 147 from 150, 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.

Going ahead to step 12:
If we divide 30 by 21, we get 1 and a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 1715405.8571
If we take 21 away from 30, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 13:
21 can be fit into 90 4 times, resulting in a remainder of 6.
The next digit of our result is 4. 
Result so far: 1715405.85714
If we subtract 84 from 90, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 14:
The number 21 fits into 60 2 times, leaving a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 1715405.857142
The remainder is 18 after subtracting 42 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 15:
180 divided by 21 is 8 with a remainder of 12.
The next digit of our result is 8. 
Result so far: 1715405.8571428
If we subtract 168 from 180, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 16:
21 goes into 120 5 times with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 1715405.85714285
Subtract 105 from 120 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final result is 1715405.85714285 with a remainder of 1.5e-08.