Let's divide 726288 by 21
We want to figure out the number of times 726288 can be divided by 21.

Step 1:
If we divide 7 by 21, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 21

Let's proceed to step 2:
21 can be fit into 72 3 times, resulting in a remainder of 9.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 63 from 72, we get 9.
Take the next digit (6) from the dividend and append it to 9, then repeat: 96 / 21

Advancing to step 3:
When dividing 96 by 21, we get 4 with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 34.0
If we subtract 84 from 96, we get 12.
Take the next digit (2) from the dividend and append it to 12, then repeat: 122 / 21

Step 4:
The number 21 fits into 122 5 times, leaving a remainder of 17.
The number 5 becomes the next digit in our result. 
Result so far: 345.0
The remainder is 17 after subtracting 105 from 122.
Grab the next digit (8) from the dividend, add it to 17, then carry on: 178 / 21

Step 5:
The number 21 fits into 178 8 times, leaving a remainder of 10.
The next digit of our result is 8. 
Result so far: 3458.0
If we take 168 away from 178, we end up with 10.
Take the next digit (8) from the dividend and append it to 10, then repeat: 108 / 21

Moving on to step 6:
21 can be fit into 108 5 times, resulting in a remainder of 3.
Record the quotient 5 as the next digit in the result. 
Result so far: 34585.0
Subtract 105 from 108 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.

Advancing to step 7:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 34585.1
Subtracting 21 from 30 leaves us 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.

Advancing to step 8:
21 goes into 90 4 times with a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 34585.14
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.

Advancing to step 9:
60 divided by 21 is 2 with a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 34585.142
If we take 42 away from 60, we end up 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.

Advancing to step 10:
180 divided by 21 is 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 34585.1428
Subtract 168 from 180 to 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.

Advancing to step 11:
120 divided by 21 is 5 with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 34585.14285
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 12:
When dividing 150 by 21, we get 7 with a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 34585.142857
Subtract 147 from 150 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.

Advancing to step 13:
If we divide 30 by 21, we get 1 and a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 34585.1428571
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.

On to step 14:
If we divide 90 by 21, we get 4 and a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 34585.14285714
Subtracting 84 from 90 leaves us 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.

The quotient of the division is 34585.14285714, and the remainder is 6e-09.