84542176 ÷ 421 
Our goal is to divide 84542176 by 421.

Going ahead to step 1:
If we divide 8 by 421, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (4) from the dividend after 8, then repeat: 84 / 421

Going ahead to step 2:
When dividing 84 by 421, we get 0 with a remainder of 84.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 84, we end up with 84.
Take the next digit (5) from the dividend and append it to 84, then repeat: 845 / 421

Let's proceed to step 3:
When dividing 845 by 421, we get 2 with a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 3 after subtracting 842 from 845.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 421

Moving on to step 4:
421 can be fit into 34 0 times, resulting in a remainder of 34.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
The remainder is 34 after subtracting 0 from 34.
Fetch the next digit (2) from the dividend, attach it to 34 and continue: 342 / 421

On to step 5:
421 can be fit into 342 0 times, resulting in a remainder of 342.
Record the quotient 0 as the next digit in the result. 
Result so far: 200.0
If we take 0 away from 342, we end up with 342.
Grab the next digit (1) from the dividend, add it to 342, then carry on: 3421 / 421

Moving on to step 6:
If we divide 3421 by 421, we get 8 and a remainder of 53.
Write down 8 as next digit of the result. 
Result so far: 2008.0
Deduct 3368 from 3421 and we're left with 53.
Fetch the next digit (7) from the dividend, attach it to 53 and continue: 537 / 421

Step 7:
When dividing 537 by 421, we get 1 with a remainder of 116.
Use 1 as the next digit of our solution. 
Result so far: 20081.0
If we subtract 421 from 537, we get 116.
Include the next digit (6) from the dividend after 116, then repeat: 1166 / 421

Going ahead to step 8:
421 goes into 1166 2 times with a remainder of 324.
The number 2 becomes the next digit in our result. 
Result so far: 200812.0
The remainder is 324 after subtracting 842 from 1166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Let's proceed to step 9:
When dividing 3240 by 421, we get 7 with a remainder of 293.
Use 7 as the next digit of our solution. 
Result so far: 200812.7
If we take 2947 away from 3240, we end up with 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2930, and continue the process.

Let's proceed to step 10:
421 can be fit into 2930 6 times, resulting in a remainder of 404.
Record the quotient 6 as the next digit in the result. 
Result so far: 200812.76
Subtract 2526 from 2930 to get 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

Moving on to step 11:
If we divide 4040 by 421, we get 9 and a remainder of 251.
The next digit of our result is 9. 
Result so far: 200812.769
If we subtract 3789 from 4040, we get 251.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2510, and continue the process.

Advancing to step 12:
If we divide 2510 by 421, we get 5 and a remainder of 405.
The next digit of our result is 5. 
Result so far: 200812.7695
The remainder is 405 after subtracting 2105 from 2510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4050, and continue the process.

Moving on to step 13:
If we divide 4050 by 421, we get 9 and a remainder of 261.
Use 9 as the next digit of our solution. 
Result so far: 200812.76959
If we subtract 3789 from 4050, we get 261.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2610, and continue the process.

Step 14:
If we divide 2610 by 421, we get 6 and a remainder of 84.
The number 6 becomes the next digit in our result. 
Result so far: 200812.769596
The remainder is 84 after subtracting 2526 from 2610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Moving on to step 15:
840 divided by 421 is 1 with a remainder of 419.
Write down 1 as next digit of the result. 
Result so far: 200812.7695961
Deduct 421 from 840 and we're left with 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4190, and continue the process.

Advancing to step 16:
421 can be fit into 4190 9 times, resulting in a remainder of 401.
The next digit of our result is 9. 
Result so far: 200812.76959619
Deduct 3789 from 4190 and we're left with 401.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4010, and continue the process.

Our division results in 200812.76959619 with a remaining 4.01e-07.