We look at the division of 736665 by 21 
We want to figure out the number of times 736665 can be divided by 21.

On to step 1:
7 divided by 21 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (3) from the dividend after 7, then repeat: 73 / 21

Advancing to step 2:
The number 21 fits into 73 3 times, leaving a remainder of 10.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 63 from 73 to get 10.
Grab the next digit (6) from the dividend, add it to 10, then carry on: 106 / 21

On to step 3:
When dividing 106 by 21, we get 5 with a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 35.0
Subtract 105 from 106 to get 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 21

Step 4:
21 goes into 16 0 times with a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 350.0
Deduct 0 from 16 and we're left with 16.
Bring next digit (6) of the dividend behind the 16 and repeat the process: 166 / 21

Advancing to step 5:
21 goes into 166 7 times with a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 3507.0
If we subtract 147 from 166, we get 19.
Append the next digit (5) from the dividend to 19 and continue with: 195 / 21

Going ahead to step 6:
The number 21 fits into 195 9 times, leaving a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 35079.0
If we subtract 189 from 195, 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.

Advancing to step 7:
If we divide 60 by 21, we get 2 and a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 35079.2
Subtracting 42 from 60 leaves us with 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 8:
21 can be fit into 180 8 times, resulting in a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 35079.28
The remainder is 12 after subtracting 168 from 180.
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 9:
21 goes into 120 5 times with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 35079.285
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.

Moving on to step 10:
21 goes into 150 7 times with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 35079.2857
Subtracting 147 from 150 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 11:
If we divide 30 by 21, we get 1 and a remainder of 9.
The next digit of our result is 1. 
Result so far: 35079.28571
Subtract 21 from 30 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 12:
The number 21 fits into 90 4 times, leaving a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 35079.285714
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 13:
21 can be fit into 60 2 times, resulting in a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 35079.2857142
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 14:
21 goes into 180 8 times with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 35079.28571428
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.

In conclusion, the division gives 35079.28571428 with a balance of 1.2e-08.