1728340 divided by 521 
Our goal is to divide 1728340 by 521.

Advancing to step 1:
521 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 521

Let's proceed to step 2:
521 can be fit into 17 0 times, resulting in a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 17 to get 17.
Append the next digit (2) from the dividend to 17 and continue with: 172 / 521

Going ahead to step 3:
If we divide 172 by 521, we get 0 and a remainder of 172.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 172, we get 172.
Bring next digit (8) of the dividend behind the 172 and repeat the process: 1728 / 521

Step 4:
If we divide 1728 by 521, we get 3 and a remainder of 165.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 1563 from 1728 leaves us with 165.
Fetch the next digit (3) from the dividend, attach it to 165 and continue: 1653 / 521

Step 5:
521 goes into 1653 3 times with a remainder of 90.
Write down 3 as next digit of the result. 
Result so far: 33.0
Deduct 1563 from 1653 and we're left with 90.
Bring next digit (4) of the dividend behind the 90 and repeat the process: 904 / 521

Moving on to step 6:
The number 521 fits into 904 1 times, leaving a remainder of 383.
Record the quotient 1 as the next digit in the result. 
Result so far: 331.0
If we subtract 521 from 904, we get 383.
Take the next digit (0) from the dividend and append it to 383, then repeat: 3830 / 521

Let's proceed to step 7:
If we divide 3830 by 521, we get 7 and a remainder of 183.
The next digit of our result is 7. 
Result so far: 3317.0
Deduct 3647 from 3830 and we're left with 183.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1830, and continue the process.

Step 8:
521 goes into 1830 3 times with a remainder of 267.
Record the quotient 3 as the next digit in the result. 
Result so far: 3317.3
Subtract 1563 from 1830 to get 267.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2670, and continue the process.

Going ahead to step 9:
521 goes into 2670 5 times with a remainder of 65.
Use 5 as the next digit of our solution. 
Result so far: 3317.35
If we subtract 2605 from 2670, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 10:
If we divide 650 by 521, we get 1 and a remainder of 129.
Put 1 as the next digit of the answer. 
Result so far: 3317.351
Subtracting 521 from 650 leaves us with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

Moving on to step 11:
If we divide 1290 by 521, we get 2 and a remainder of 248.
Record the quotient 2 as the next digit in the result. 
Result so far: 3317.3512
If we take 1042 away from 1290, we end up with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Let's proceed to step 12:
2480 divided by 521 is 4 with a remainder of 396.
The number 4 becomes the next digit in our result. 
Result so far: 3317.35124
Subtract 2084 from 2480 to get 396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Going ahead to step 13:
521 can be fit into 3960 7 times, resulting in a remainder of 313.
Put 7 as the next digit of the answer. 
Result so far: 3317.351247
Subtract 3647 from 3960 to get 313.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3130, and continue the process.

Let's proceed to step 14:
3130 divided by 521 is 6 with a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 3317.3512476
The remainder is 4 after subtracting 3126 from 3130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 15:
521 can be fit into 40 0 times, resulting in a remainder of 40.
The next digit of our result is 0. 
Result so far: 3317.3512476
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final outcome is 3317.3512476, with a leftover of 4e-08.