75716486 divided by 421 
We want to figure out the number of times 75716486 can be divided by 421.

On to step 1:
When dividing 7 by 421, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (5) from the dividend after 7, then repeat: 75 / 421

Let's proceed to step 2:
421 goes into 75 0 times with a remainder of 75.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 75 after subtracting 0 from 75.
Take the next digit (7) from the dividend and append it to 75, then repeat: 757 / 421

Advancing to step 3:
If we divide 757 by 421, we get 1 and a remainder of 336.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 421 from 757, we get 336.
Include the next digit (1) from the dividend after 336, then repeat: 3361 / 421

Moving on to step 4:
421 goes into 3361 7 times with a remainder of 414.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
Deduct 2947 from 3361 and we're left with 414.
Append the next digit (6) from the dividend to 414 and continue with: 4146 / 421

Advancing to step 5:
421 can be fit into 4146 9 times, resulting in a remainder of 357.
The next digit of our result is 9. 
Result so far: 179.0
Subtract 3789 from 4146 to get 357.
Bring next digit (4) of the dividend behind the 357 and repeat the process: 3574 / 421

Moving on to step 6:
421 can be fit into 3574 8 times, resulting in a remainder of 206.
Write down 8 as next digit of the result. 
Result so far: 1798.0
Deduct 3368 from 3574 and we're left with 206.
Bring next digit (8) of the dividend behind the 206 and repeat the process: 2068 / 421

On to step 7:
If we divide 2068 by 421, we get 4 and a remainder of 384.
Put 4 as the next digit of the answer. 
Result so far: 17984.0
If we take 1684 away from 2068, we end up with 384.
Fetch the next digit (6) from the dividend, attach it to 384 and continue: 3846 / 421

On to step 8:
When dividing 3846 by 421, we get 9 with a remainder of 57.
Put 9 as the next digit of the answer. 
Result so far: 179849.0
If we take 3789 away from 3846, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 9:
If we divide 570 by 421, we get 1 and a remainder of 149.
Write down 1 as next digit of the result. 
Result so far: 179849.1
The remainder is 149 after subtracting 421 from 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

Advancing to step 10:
The number 421 fits into 1490 3 times, leaving a remainder of 227.
The next digit of our result is 3. 
Result so far: 179849.13
The remainder is 227 after subtracting 1263 from 1490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Advancing to step 11:
If we divide 2270 by 421, we get 5 and a remainder of 165.
The number 5 becomes the next digit in our result. 
Result so far: 179849.135
The remainder is 165 after subtracting 2105 from 2270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Advancing to step 12:
1650 divided by 421 is 3 with a remainder of 387.
Write down 3 as next digit of the result. 
Result so far: 179849.1353
Subtract 1263 from 1650 to get 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

On to step 13:
If we divide 3870 by 421, we get 9 and a remainder of 81.
The next digit of our result is 9. 
Result so far: 179849.13539
If we subtract 3789 from 3870, we get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 14:
If we divide 810 by 421, we get 1 and a remainder of 389.
Put 1 as the next digit of the answer. 
Result so far: 179849.135391
If we take 421 away from 810, we end up with 389.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3890, and continue the process.

Advancing to step 15:
421 goes into 3890 9 times with a remainder of 101.
Use 9 as the next digit of our solution. 
Result so far: 179849.1353919
Deduct 3789 from 3890 and we're left with 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

On to step 16:
The number 421 fits into 1010 2 times, leaving a remainder of 168.
Put 2 as the next digit of the answer. 
Result so far: 179849.13539192
The remainder is 168 after subtracting 842 from 1010.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

The final result is 179849.13539192 with a remainder of 1.68e-07.