3351571 ÷ 721 
Let's see how many times 721 fits into 3351571.

Advancing to step 1:
721 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 721

Let's proceed to step 2:
33 divided by 721 is 0 with a remainder of 33.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 33 and we're left with 33.
Fetch the next digit (5) from the dividend, attach it to 33 and continue: 335 / 721

Advancing to step 3:
If we divide 335 by 721, we get 0 and a remainder of 335.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 335 after subtracting 0 from 335.
Append the next digit (1) from the dividend to 335 and continue with: 3351 / 721

Step 4:
If we divide 3351 by 721, we get 4 and a remainder of 467.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 2884 from 3351 and we're left with 467.
Bring next digit (5) of the dividend behind the 467 and repeat the process: 4675 / 721

Let's proceed to step 5:
If we divide 4675 by 721, we get 6 and a remainder of 349.
Write down 6 as next digit of the result. 
Result so far: 46.0
Subtracting 4326 from 4675 leaves us with 349.
Take the next digit (7) from the dividend and append it to 349, then repeat: 3497 / 721

On to step 6:
721 can be fit into 3497 4 times, resulting in a remainder of 613.
Write down 4 as next digit of the result. 
Result so far: 464.0
If we subtract 2884 from 3497, we get 613.
Take the next digit (1) from the dividend and append it to 613, then repeat: 6131 / 721

On to step 7:
The number 721 fits into 6131 8 times, leaving a remainder of 363.
Use 8 as the next digit of our solution. 
Result so far: 4648.0
The remainder is 363 after subtracting 5768 from 6131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3630, and continue the process.

Going ahead to step 8:
The number 721 fits into 3630 5 times, leaving a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 4648.5
Subtract 3605 from 3630 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 9:
250 divided by 721 is 0 with a remainder of 250.
Use 0 as the next digit of our solution. 
Result so far: 4648.5
Subtract 0 from 250 to get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

On to step 10:
The number 721 fits into 2500 3 times, leaving a remainder of 337.
The number 3 becomes the next digit in our result. 
Result so far: 4648.503
Subtract 2163 from 2500 to get 337.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3370, and continue the process.

Let's proceed to step 11:
3370 divided by 721 is 4 with a remainder of 486.
Put 4 as the next digit of the answer. 
Result so far: 4648.5034
If we subtract 2884 from 3370, we get 486.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4860, and continue the process.

Let's proceed to step 12:
When dividing 4860 by 721, we get 6 with a remainder of 534.
Record the quotient 6 as the next digit in the result. 
Result so far: 4648.50346
If we take 4326 away from 4860, we end up with 534.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5340, and continue the process.

Advancing to step 13:
The number 721 fits into 5340 7 times, leaving a remainder of 293.
Record the quotient 7 as the next digit in the result. 
Result so far: 4648.503467
Deduct 5047 from 5340 and we're left with 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2930, and continue the process.

Step 14:
The number 721 fits into 2930 4 times, leaving a remainder of 46.
The next digit of our result is 4. 
Result so far: 4648.5034674
Subtracting 2884 from 2930 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 15:
If we divide 460 by 721, we get 0 and a remainder of 460.
The number 0 becomes the next digit in our result. 
Result so far: 4648.5034674
Subtracting 0 from 460 leaves us with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

The final result is 4648.5034674 with a remainder of 4.6e-07.