86657287 divided by 421 
We want to divide 86657287 by 421.

Moving on to step 1:
If we divide 8 by 421, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 421

Let's proceed to step 2:
The number 421 fits into 86 0 times, leaving a remainder of 86.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 86 to get 86.
Include the next digit (6) from the dividend after 86, then repeat: 866 / 421

Moving on to step 3:
The number 421 fits into 866 2 times, leaving a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 24 after subtracting 842 from 866.
Append the next digit (5) from the dividend to 24 and continue with: 245 / 421

Let's proceed to step 4:
The number 421 fits into 245 0 times, leaving a remainder of 245.
Use 0 as the next digit of our solution. 
Result so far: 20.0
If we subtract 0 from 245, we get 245.
Bring next digit (7) of the dividend behind the 245 and repeat the process: 2457 / 421

Advancing to step 5:
The number 421 fits into 2457 5 times, leaving a remainder of 352.
Put 5 as the next digit of the answer. 
Result so far: 205.0
The remainder is 352 after subtracting 2105 from 2457.
Include the next digit (2) from the dividend after 352, then repeat: 3522 / 421

Step 6:
The number 421 fits into 3522 8 times, leaving a remainder of 154.
Use 8 as the next digit of our solution. 
Result so far: 2058.0
If we take 3368 away from 3522, we end up with 154.
Take the next digit (8) from the dividend and append it to 154, then repeat: 1548 / 421

Going ahead to step 7:
421 goes into 1548 3 times with a remainder of 285.
Use 3 as the next digit of our solution. 
Result so far: 20583.0
If we take 1263 away from 1548, we end up with 285.
Append the next digit (7) from the dividend to 285 and continue with: 2857 / 421

Moving on to step 8:
2857 divided by 421 is 6 with a remainder of 331.
Record the quotient 6 as the next digit in the result. 
Result so far: 205836.0
Subtract 2526 from 2857 to get 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

On to step 9:
421 can be fit into 3310 7 times, resulting in a remainder of 363.
Use 7 as the next digit of our solution. 
Result so far: 205836.7
Subtract 2947 from 3310 to get 363.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3630, and continue the process.

Going ahead to step 10:
The number 421 fits into 3630 8 times, leaving a remainder of 262.
Record the quotient 8 as the next digit in the result. 
Result so far: 205836.78
Subtract 3368 from 3630 to get 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Going ahead to step 11:
2620 divided by 421 is 6 with a remainder of 94.
The next digit of our result is 6. 
Result so far: 205836.786
If we subtract 2526 from 2620, we get 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Advancing to step 12:
The number 421 fits into 940 2 times, leaving a remainder of 98.
Write down 2 as next digit of the result. 
Result so far: 205836.7862
If we subtract 842 from 940, we get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Moving on to step 13:
421 can be fit into 980 2 times, resulting in a remainder of 138.
The number 2 becomes the next digit in our result. 
Result so far: 205836.78622
Subtracting 842 from 980 leaves us with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

After the division, we end up with 205836.78622 and a remainder of 0.000138.