We're dividing 735070 by 21 
Our goal is to divide 735070 by 21.

Let's proceed to step 1:
21 can be fit into 7 0 times, resulting in a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 21

On to step 2:
The number 21 fits into 73 3 times, leaving a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 63 away from 73, we end up with 10.
Take the next digit (5) from the dividend and append it to 10, then repeat: 105 / 21

Let's proceed to step 3:
105 divided by 21 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 35.0
If we take 105 away from 105, we end up with 0.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 21

Going ahead to step 4:
If we divide 0 by 21, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 350.0
The remainder is 0 after subtracting 0 from 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 21

Step 5:
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: 3500.0
Subtracting 0 from 7 leaves us with 7.
Grab the next digit (0) from the dividend, add it to 7, then carry on: 70 / 21

Going ahead to step 6:
21 goes into 70 3 times with a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 35003.0
The remainder is 7 after subtracting 63 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
If we divide 70 by 21, we get 3 and a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 35003.3
Subtract 63 from 70 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 8:
21 can be fit into 70 3 times, resulting in a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 35003.33
Deduct 63 from 70 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Our division results in 35003.33 with a remaining 0.007.