88164321 ÷ 421 
Let's see how many times 421 fits into 88164321.

Advancing to step 1:
When dividing 8 by 421, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (8) from the dividend and append it to 8, then repeat: 88 / 421

Let's proceed to step 2:
421 goes into 88 0 times with a remainder of 88.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 88, we get 88.
Take the next digit (1) from the dividend and append it to 88, then repeat: 881 / 421

Going ahead to step 3:
881 divided by 421 is 2 with a remainder of 39.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 842 from 881 to get 39.
Fetch the next digit (6) from the dividend, attach it to 39 and continue: 396 / 421

On to step 4:
The number 421 fits into 396 0 times, leaving a remainder of 396.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Subtract 0 from 396 to get 396.
Fetch the next digit (4) from the dividend, attach it to 396 and continue: 3964 / 421

On to step 5:
421 goes into 3964 9 times with a remainder of 175.
Put 9 as the next digit of the answer. 
Result so far: 209.0
Subtract 3789 from 3964 to get 175.
Take the next digit (3) from the dividend and append it to 175, then repeat: 1753 / 421

On to step 6:
421 goes into 1753 4 times with a remainder of 69.
Write down 4 as next digit of the result. 
Result so far: 2094.0
Subtracting 1684 from 1753 leaves us with 69.
Append the next digit (2) from the dividend to 69 and continue with: 692 / 421

Step 7:
When dividing 692 by 421, we get 1 with a remainder of 271.
The next digit of our result is 1. 
Result so far: 20941.0
If we subtract 421 from 692, we get 271.
Fetch the next digit (1) from the dividend, attach it to 271 and continue: 2711 / 421

Moving on to step 8:
If we divide 2711 by 421, we get 6 and a remainder of 185.
Record the quotient 6 as the next digit in the result. 
Result so far: 209416.0
Subtracting 2526 from 2711 leaves us with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Step 9:
421 can be fit into 1850 4 times, resulting in a remainder of 166.
Use 4 as the next digit of our solution. 
Result so far: 209416.4
Subtract 1684 from 1850 to get 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Moving on to step 10:
If we divide 1660 by 421, we get 3 and a remainder of 397.
The next digit of our result is 3. 
Result so far: 209416.43
If we take 1263 away from 1660, we end up with 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

On to step 11:
3970 divided by 421 is 9 with a remainder of 181.
Put 9 as the next digit of the answer. 
Result so far: 209416.439
The remainder is 181 after subtracting 3789 from 3970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Step 12:
If we divide 1810 by 421, we get 4 and a remainder of 126.
Use 4 as the next digit of our solution. 
Result so far: 209416.4394
Subtracting 1684 from 1810 leaves us with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Going ahead to step 13:
421 can be fit into 1260 2 times, resulting in a remainder of 418.
Put 2 as the next digit of the answer. 
Result so far: 209416.43942
The remainder is 418 after subtracting 842 from 1260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Going ahead to step 14:
421 can be fit into 4180 9 times, resulting in a remainder of 391.
Record the quotient 9 as the next digit in the result. 
Result so far: 209416.439429
Subtracting 3789 from 4180 leaves us with 391.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3910, and continue the process.

Moving on to step 15:
When dividing 3910 by 421, we get 9 with a remainder of 121.
Use 9 as the next digit of our solution. 
Result so far: 209416.4394299
If we subtract 3789 from 3910, we get 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

Our division results in 209416.4394299 with a remaining 1.21e-06.