We look at the division of 21351365 by 14 
We want to figure out the number of times 21351365 can be divided by 14.

On to step 1:
14 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 14

Step 2:
The number 14 fits into 21 1 times, leaving a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 14 away from 21, we end up with 7.
Include the next digit (3) from the dividend after 7, then repeat: 73 / 14

Going ahead to step 3:
When dividing 73 by 14, we get 5 with a remainder of 3.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
The remainder is 3 after subtracting 70 from 73.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 14

Going ahead to step 4:
14 can be fit into 35 2 times, resulting in a remainder of 7.
Write down 2 as next digit of the result. 
Result so far: 152.0
Subtract 28 from 35 to get 7.
Fetch the next digit (1) from the dividend, attach it to 7 and continue: 71 / 14

Advancing to step 5:
14 goes into 71 5 times with a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 1525.0
Deduct 70 from 71 and we're left with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 14

Step 6:
13 divided by 14 is 0 with a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 15250.0
Deduct 0 from 13 and we're left with 13.
Fetch the next digit (6) from the dividend, attach it to 13 and continue: 136 / 14

Let's proceed to step 7:
136 divided by 14 is 9 with a remainder of 10.
The number 9 becomes the next digit in our result. 
Result so far: 152509.0
If we subtract 126 from 136, we get 10.
Include the next digit (5) from the dividend after 10, then repeat: 105 / 14

Let's proceed to step 8:
When dividing 105 by 14, we get 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 1525097.0
If we subtract 98 from 105, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 9:
The number 14 fits into 70 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 1525097.5
Subtract 70 from 70 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 10:
If we divide 0 by 14, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1525097.5
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 11:
When dividing 0 by 14, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1525097.5
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 1525097.5 and a remainder of 0.0.