743656 ÷ 21 
We want to divide 743656 by 21.

Advancing to step 1:
The number 21 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 21

Let's proceed to step 2:
21 can be fit into 74 3 times, resulting in a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 63 from 74, we get 11.
Append the next digit (3) from the dividend to 11 and continue with: 113 / 21

Moving on to step 3:
113 divided by 21 is 5 with a remainder of 8.
Write down 5 as next digit of the result. 
Result so far: 35.0
The remainder is 8 after subtracting 105 from 113.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 21

Step 4:
86 divided by 21 is 4 with a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 354.0
Deduct 84 from 86 and we're left with 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 21

Step 5:
21 goes into 25 1 times with a remainder of 4.
Record the quotient 1 as the next digit in the result. 
Result so far: 3541.0
Deduct 21 from 25 and we're left with 4.
Append the next digit (6) from the dividend to 4 and continue with: 46 / 21

Going ahead to step 6:
21 goes into 46 2 times with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 35412.0
If we subtract 42 from 46, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 7:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 35412.1
If we take 21 away from 40, we end up 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.

Step 8:
When dividing 190 by 21, we get 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 35412.19
If we take 189 away from 190, we end up 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.

Moving on to step 9:
The number 21 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 35412.19
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 10:
If we divide 100 by 21, we get 4 and a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 35412.1904
Subtracting 84 from 100 leaves us with 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 11:
When dividing 160 by 21, we get 7 with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 35412.19047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 12:
130 divided by 21 is 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 35412.190476
Subtracting 126 from 130 leaves us 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.

Going ahead to step 13:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 35412.1904761
Subtract 21 from 40 to 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.

Step 14:
21 goes into 190 9 times with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 35412.19047619
Deduct 189 from 190 and we're left 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.

The final result is 35412.19047619 with a remainder of 1e-09.