91778025 divided by 421 
Our goal is to divide 91778025 by 421.

Step 1:
421 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 421

Advancing to step 2:
If we divide 91 by 421, we get 0 and a remainder of 91.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 91 leaves us with 91.
Grab the next digit (7) from the dividend, add it to 91, then carry on: 917 / 421

Going ahead to step 3:
The number 421 fits into 917 2 times, leaving a remainder of 75.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 842 from 917 to get 75.
Grab the next digit (7) from the dividend, add it to 75, then carry on: 757 / 421

On to step 4:
421 goes into 757 1 times with a remainder of 336.
Use 1 as the next digit of our solution. 
Result so far: 21.0
The remainder is 336 after subtracting 421 from 757.
Include the next digit (8) from the dividend after 336, then repeat: 3368 / 421

On to step 5:
421 can be fit into 3368 8 times, resulting in a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 218.0
If we subtract 3368 from 3368, we get 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 421

Moving on to step 6:
421 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 2180.0
If we take 0 away from 0, we end up with 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 421

On to step 7:
If we divide 2 by 421, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 21800.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 421

Let's proceed to step 8:
The number 421 fits into 25 0 times, leaving a remainder of 25.
Record the quotient 0 as the next digit in the result. 
Result so far: 218000.0
Subtract 0 from 25 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.

Moving on to step 9:
When dividing 250 by 421, we get 0 with a remainder of 250.
Put 0 as the next digit of the answer. 
Result so far: 218000.0
The remainder is 250 after subtracting 0 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Let's proceed to step 10:
421 goes into 2500 5 times with a remainder of 395.
The number 5 becomes the next digit in our result. 
Result so far: 218000.05
If we take 2105 away from 2500, we end up with 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

On to step 11:
If we divide 3950 by 421, we get 9 and a remainder of 161.
Record the quotient 9 as the next digit in the result. 
Result so far: 218000.059
If we subtract 3789 from 3950, we get 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

Advancing to step 12:
421 can be fit into 1610 3 times, resulting in a remainder of 347.
The number 3 becomes the next digit in our result. 
Result so far: 218000.0593
Subtract 1263 from 1610 to get 347.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

Moving on to step 13:
When dividing 3470 by 421, we get 8 with a remainder of 102.
Write down 8 as next digit of the result. 
Result so far: 218000.05938
The remainder is 102 after subtracting 3368 from 3470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Going ahead to step 14:
If we divide 1020 by 421, we get 2 and a remainder of 178.
The next digit of our result is 2. 
Result so far: 218000.059382
The remainder is 178 after subtracting 842 from 1020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Advancing to step 15:
421 goes into 1780 4 times with a remainder of 96.
Write down 4 as next digit of the result. 
Result so far: 218000.0593824
If we take 1684 away from 1780, we end up with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Let's proceed to step 16:
The number 421 fits into 960 2 times, leaving a remainder of 118.
Record the quotient 2 as the next digit in the result. 
Result so far: 218000.05938242
Deduct 842 from 960 and we're left with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

The final result is 218000.05938242 with a remainder of 1.18e-07.