86486949 ÷ 451 
Our goal is to divide 86486949 by 451.

On to step 1:
451 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 451

Going ahead to step 2:
If we divide 86 by 451, we get 0 and a remainder of 86.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Bring next digit (4) of the dividend behind the 86 and repeat the process: 864 / 451

Advancing to step 3:
451 can be fit into 864 1 times, resulting in a remainder of 413.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 451 away from 864, we end up with 413.
Append the next digit (8) from the dividend to 413 and continue with: 4138 / 451

On to step 4:
When dividing 4138 by 451, we get 9 with a remainder of 79.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Subtract 4059 from 4138 to get 79.
Fetch the next digit (6) from the dividend, attach it to 79 and continue: 796 / 451

On to step 5:
796 divided by 451 is 1 with a remainder of 345.
Use 1 as the next digit of our solution. 
Result so far: 191.0
Deduct 451 from 796 and we're left with 345.
Grab the next digit (9) from the dividend, add it to 345, then carry on: 3459 / 451

Moving on to step 6:
The number 451 fits into 3459 7 times, leaving a remainder of 302.
Use 7 as the next digit of our solution. 
Result so far: 1917.0
If we subtract 3157 from 3459, we get 302.
Take the next digit (4) from the dividend and append it to 302, then repeat: 3024 / 451

Moving on to step 7:
The number 451 fits into 3024 6 times, leaving a remainder of 318.
Use 6 as the next digit of our solution. 
Result so far: 19176.0
Deduct 2706 from 3024 and we're left with 318.
Bring next digit (9) of the dividend behind the 318 and repeat the process: 3189 / 451

Advancing to step 8:
3189 divided by 451 is 7 with a remainder of 32.
The number 7 becomes the next digit in our result. 
Result so far: 191767.0
If we take 3157 away from 3189, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 9:
451 goes into 320 0 times with a remainder of 320.
Put 0 as the next digit of the answer. 
Result so far: 191767.0
Subtract 0 from 320 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 10:
When dividing 3200 by 451, we get 7 with a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 191767.07
The remainder is 43 after subtracting 3157 from 3200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 11:
If we divide 430 by 451, we get 0 and a remainder of 430.
The next digit of our result is 0. 
Result so far: 191767.07
If we take 0 away from 430, we end up with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

Moving on to step 12:
451 goes into 4300 9 times with a remainder of 241.
Write down 9 as next digit of the result. 
Result so far: 191767.0709
If we take 4059 away from 4300, we end up with 241.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

Step 13:
When dividing 2410 by 451, we get 5 with a remainder of 155.
Record the quotient 5 as the next digit in the result. 
Result so far: 191767.07095
Deduct 2255 from 2410 and we're left with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Advancing to step 14:
When dividing 1550 by 451, we get 3 with a remainder of 197.
Use 3 as the next digit of our solution. 
Result so far: 191767.070953
Subtracting 1353 from 1550 leaves us with 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

Going ahead to step 15:
The number 451 fits into 1970 4 times, leaving a remainder of 166.
The next digit of our result is 4. 
Result so far: 191767.0709534
Subtracting 1804 from 1970 leaves us with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Going ahead to step 16:
The number 451 fits into 1660 3 times, leaving a remainder of 307.
Record the quotient 3 as the next digit in the result. 
Result so far: 191767.07095343
Subtract 1353 from 1660 to get 307.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3070, and continue the process.

Our division results in 191767.07095343 with a remaining 3.07e-07.