We're dividing 726235 by 21 
We want to figure out the number of times 726235 can be divided by 21.

On to step 1:
The number 21 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 21

Advancing to step 2:
When dividing 72 by 21, we get 3 with a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtract 63 from 72 to get 9.
Bring next digit (6) of the dividend behind the 9 and repeat the process: 96 / 21

On to step 3:
The number 21 fits into 96 4 times, leaving a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 34.0
The remainder is 12 after subtracting 84 from 96.
Bring next digit (2) of the dividend behind the 12 and repeat the process: 122 / 21

Step 4:
21 can be fit into 122 5 times, resulting in a remainder of 17.
Use 5 as the next digit of our solution. 
Result so far: 345.0
Subtracting 105 from 122 leaves us with 17.
Fetch the next digit (3) from the dividend, attach it to 17 and continue: 173 / 21

Step 5:
When dividing 173 by 21, we get 8 with a remainder of 5.
Use 8 as the next digit of our solution. 
Result so far: 3458.0
If we take 168 away from 173, we end up with 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 21

Let's proceed to step 6:
The number 21 fits into 55 2 times, leaving a remainder of 13.
Use 2 as the next digit of our solution. 
Result so far: 34582.0
If we subtract 42 from 55, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 7:
If we divide 130 by 21, we get 6 and a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 34582.6
Deduct 126 from 130 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 8:
21 goes into 40 1 times with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 34582.61
Deduct 21 from 40 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 9:
21 can be fit into 190 9 times, resulting in a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 34582.619
Subtracting 189 from 190 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 10:
When dividing 10 by 21, we get 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 34582.619
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 11:
21 goes into 100 4 times with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 34582.61904
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 12:
If we divide 160 by 21, we get 7 and a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 34582.619047
Subtract 147 from 160 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 13:
If we divide 130 by 21, we get 6 and a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 34582.6190476
Deduct 126 from 130 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 14:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 34582.61904761
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The quotient of the division is 34582.61904761, and the remainder is 1.9e-08.