Let's divide 86273077 by 421
We want to divide 86273077 by 421.

Going ahead to step 1:
The number 421 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 421

Going ahead to step 2:
If we divide 86 by 421, we get 0 and a remainder of 86.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Grab the next digit (2) from the dividend, add it to 86, then carry on: 862 / 421

Advancing to step 3:
If we divide 862 by 421, we get 2 and a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 842 from 862, we get 20.
Bring next digit (7) of the dividend behind the 20 and repeat the process: 207 / 421

Moving on to step 4:
207 divided by 421 is 0 with a remainder of 207.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Subtracting 0 from 207 leaves us with 207.
Include the next digit (3) from the dividend after 207, then repeat: 2073 / 421

Step 5:
421 goes into 2073 4 times with a remainder of 389.
Put 4 as the next digit of the answer. 
Result so far: 204.0
Subtracting 1684 from 2073 leaves us with 389.
Include the next digit (0) from the dividend after 389, then repeat: 3890 / 421

Going ahead to step 6:
If we divide 3890 by 421, we get 9 and a remainder of 101.
The number 9 becomes the next digit in our result. 
Result so far: 2049.0
The remainder is 101 after subtracting 3789 from 3890.
Append the next digit (7) from the dividend to 101 and continue with: 1017 / 421

Going ahead to step 7:
When dividing 1017 by 421, we get 2 with a remainder of 175.
The next digit of our result is 2. 
Result so far: 20492.0
Deduct 842 from 1017 and we're left with 175.
Bring next digit (7) of the dividend behind the 175 and repeat the process: 1757 / 421

Moving on to step 8:
421 can be fit into 1757 4 times, resulting in a remainder of 73.
Put 4 as the next digit of the answer. 
Result so far: 204924.0
Subtract 1684 from 1757 to get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

On to step 9:
421 goes into 730 1 times with a remainder of 309.
Use 1 as the next digit of our solution. 
Result so far: 204924.1
Subtracting 421 from 730 leaves us with 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Let's proceed to step 10:
If we divide 3090 by 421, we get 7 and a remainder of 143.
The next digit of our result is 7. 
Result so far: 204924.17
If we subtract 2947 from 3090, we get 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

Advancing to step 11:
The number 421 fits into 1430 3 times, leaving a remainder of 167.
Record the quotient 3 as the next digit in the result. 
Result so far: 204924.173
If we subtract 1263 from 1430, we get 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

Moving on to step 12:
421 goes into 1670 3 times with a remainder of 407.
Use 3 as the next digit of our solution. 
Result so far: 204924.1733
Subtracting 1263 from 1670 leaves us with 407.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

After the division, we end up with 204924.1733 and a remainder of 0.00407.