Let's divide 43880687 by 521
We want to figure out the number of times 43880687 can be divided by 521.

Going ahead to step 1:
The number 521 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 521

Step 2:
521 goes into 43 0 times with a remainder of 43.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Take the next digit (8) from the dividend and append it to 43, then repeat: 438 / 521

Advancing to step 3:
The number 521 fits into 438 0 times, leaving a remainder of 438.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 438 leaves us with 438.
Fetch the next digit (8) from the dividend, attach it to 438 and continue: 4388 / 521

Moving on to step 4:
521 can be fit into 4388 8 times, resulting in a remainder of 220.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Deduct 4168 from 4388 and we're left with 220.
Fetch the next digit (0) from the dividend, attach it to 220 and continue: 2200 / 521

Let's proceed to step 5:
When dividing 2200 by 521, we get 4 with a remainder of 116.
Use 4 as the next digit of our solution. 
Result so far: 84.0
Subtract 2084 from 2200 to get 116.
Append the next digit (6) from the dividend to 116 and continue with: 1166 / 521

Step 6:
1166 divided by 521 is 2 with a remainder of 124.
Record the quotient 2 as the next digit in the result. 
Result so far: 842.0
Deduct 1042 from 1166 and we're left with 124.
Take the next digit (8) from the dividend and append it to 124, then repeat: 1248 / 521

Step 7:
When dividing 1248 by 521, we get 2 with a remainder of 206.
Use 2 as the next digit of our solution. 
Result so far: 8422.0
Subtracting 1042 from 1248 leaves us with 206.
Bring next digit (7) of the dividend behind the 206 and repeat the process: 2067 / 521

Advancing to step 8:
When dividing 2067 by 521, we get 3 with a remainder of 504.
Record the quotient 3 as the next digit in the result. 
Result so far: 84223.0
Subtracting 1563 from 2067 leaves us with 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

Advancing to step 9:
When dividing 5040 by 521, we get 9 with a remainder of 351.
The number 9 becomes the next digit in our result. 
Result so far: 84223.9
If we take 4689 away from 5040, we end up with 351.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3510, and continue the process.

Moving on to step 10:
When dividing 3510 by 521, we get 6 with a remainder of 384.
Put 6 as the next digit of the answer. 
Result so far: 84223.96
Subtracting 3126 from 3510 leaves us with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Advancing to step 11:
521 can be fit into 3840 7 times, resulting in a remainder of 193.
Write down 7 as next digit of the result. 
Result so far: 84223.967
The remainder is 193 after subtracting 3647 from 3840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1930, and continue the process.

On to step 12:
521 can be fit into 1930 3 times, resulting in a remainder of 367.
The number 3 becomes the next digit in our result. 
Result so far: 84223.9673
If we take 1563 away from 1930, we end up with 367.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3670, and continue the process.

Going ahead to step 13:
521 goes into 3670 7 times with a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 84223.96737
Subtract 3647 from 3670 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 14:
If we divide 230 by 521, we get 0 and a remainder of 230.
The next digit of our result is 0. 
Result so far: 84223.96737
Subtracting 0 from 230 leaves us with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Step 15:
521 can be fit into 2300 4 times, resulting in a remainder of 216.
The next digit of our result is 4. 
Result so far: 84223.9673704
The remainder is 216 after subtracting 2084 from 2300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

On to step 16:
521 goes into 2160 4 times with a remainder of 76.
Put 4 as the next digit of the answer. 
Result so far: 84223.96737044
If we subtract 2084 from 2160, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The final result is 84223.96737044 with a remainder of 7.6e-08.