We look at the division of 7748711 by 521 
Let's see how many times 521 fits into 7748711.

Let's proceed to step 1:
When dividing 7 by 521, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 521

Moving on to step 2:
521 can be fit into 77 0 times, resulting in a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 77 to get 77.
Append the next digit (4) from the dividend to 77 and continue with: 774 / 521

Moving on to step 3:
521 goes into 774 1 times with a remainder of 253.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 521 from 774, we get 253.
Append the next digit (8) from the dividend to 253 and continue with: 2538 / 521

Step 4:
When dividing 2538 by 521, we get 4 with a remainder of 454.
Write down 4 as next digit of the result. 
Result so far: 14.0
The remainder is 454 after subtracting 2084 from 2538.
Append the next digit (7) from the dividend to 454 and continue with: 4547 / 521

On to step 5:
4547 divided by 521 is 8 with a remainder of 379.
Write down 8 as next digit of the result. 
Result so far: 148.0
The remainder is 379 after subtracting 4168 from 4547.
Include the next digit (1) from the dividend after 379, then repeat: 3791 / 521

On to step 6:
When dividing 3791 by 521, we get 7 with a remainder of 144.
Write down 7 as next digit of the result. 
Result so far: 1487.0
Deduct 3647 from 3791 and we're left with 144.
Take the next digit (1) from the dividend and append it to 144, then repeat: 1441 / 521

Going ahead to step 7:
521 can be fit into 1441 2 times, resulting in a remainder of 399.
Put 2 as the next digit of the answer. 
Result so far: 14872.0
Subtracting 1042 from 1441 leaves us with 399.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3990, and continue the process.

Let's proceed to step 8:
521 goes into 3990 7 times with a remainder of 343.
Use 7 as the next digit of our solution. 
Result so far: 14872.7
Subtract 3647 from 3990 to get 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

Let's proceed to step 9:
521 can be fit into 3430 6 times, resulting in a remainder of 304.
The number 6 becomes the next digit in our result. 
Result so far: 14872.76
Subtract 3126 from 3430 to get 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Moving on to step 10:
521 can be fit into 3040 5 times, resulting in a remainder of 435.
Use 5 as the next digit of our solution. 
Result so far: 14872.765
If we subtract 2605 from 3040, we get 435.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4350, and continue the process.

Moving on to step 11:
521 can be fit into 4350 8 times, resulting in a remainder of 182.
The next digit of our result is 8. 
Result so far: 14872.7658
If we subtract 4168 from 4350, we get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Going ahead to step 12:
If we divide 1820 by 521, we get 3 and a remainder of 257.
Put 3 as the next digit of the answer. 
Result so far: 14872.76583
Subtract 1563 from 1820 to get 257.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2570, and continue the process.

On to step 13:
When dividing 2570 by 521, we get 4 with a remainder of 486.
The number 4 becomes the next digit in our result. 
Result so far: 14872.765834
The remainder is 486 after subtracting 2084 from 2570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4860, and continue the process.

On to step 14:
The number 521 fits into 4860 9 times, leaving a remainder of 171.
The next digit of our result is 9. 
Result so far: 14872.7658349
Subtracting 4689 from 4860 leaves us with 171.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

On to step 15:
The number 521 fits into 1710 3 times, leaving a remainder of 147.
The number 3 becomes the next digit in our result. 
Result so far: 14872.76583493
The remainder is 147 after subtracting 1563 from 1710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

After the division, we end up with 14872.76583493 and a remainder of 1.47e-07.