We divide 743729 by 21
Let's see how many times 21 fits into 743729.

Let's proceed to step 1:
7 divided by 21 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (4) from the dividend, add it to 7, then carry on: 74 / 21

Advancing to step 2:
When dividing 74 by 21, we get 3 with a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 63 away from 74, we end up with 11.
Fetch the next digit (3) from the dividend, attach it to 11 and continue: 113 / 21

Advancing to step 3:
The number 21 fits into 113 5 times, leaving a remainder of 8.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
The remainder is 8 after subtracting 105 from 113.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 21

Step 4:
When dividing 87 by 21, we get 4 with a remainder of 3.
Put 4 as the next digit of the answer. 
Result so far: 354.0
Subtracting 84 from 87 leaves us with 3.
Append the next digit (2) from the dividend to 3 and continue with: 32 / 21

Going ahead to step 5:
21 goes into 32 1 times with a remainder of 11.
Write down 1 as next digit of the result. 
Result so far: 3541.0
Deduct 21 from 32 and we're left with 11.
Append the next digit (9) from the dividend to 11 and continue with: 119 / 21

Advancing to step 6:
If we divide 119 by 21, we get 5 and a remainder of 14.
The number 5 becomes the next digit in our result. 
Result so far: 35415.0
Deduct 105 from 119 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 7:
If we divide 140 by 21, we get 6 and a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 35415.6
If we subtract 126 from 140, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 8:
The number 21 fits into 140 6 times, leaving a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 35415.66
Subtract 126 from 140 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

After the division, we end up with 35415.66 and a remainder of 0.014.