86288457 ÷ 31 
Our goal is to divide 86288457 by 31.

Let's proceed to step 1:
31 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 31

On to step 2:
86 divided by 31 is 2 with a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 62 from 86 and we're left with 24.
Append the next digit (2) from the dividend to 24 and continue with: 242 / 31

Let's proceed to step 3:
When dividing 242 by 31, we get 7 with a remainder of 25.
The next digit of our result is 7. 
Result so far: 27.0
Deduct 217 from 242 and we're left with 25.
Include the next digit (8) from the dividend after 25, then repeat: 258 / 31

Let's proceed to step 4:
The number 31 fits into 258 8 times, leaving a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 278.0
Subtract 248 from 258 to get 10.
Append the next digit (8) from the dividend to 10 and continue with: 108 / 31

Step 5:
31 goes into 108 3 times with a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 2783.0
Subtracting 93 from 108 leaves us with 15.
Bring next digit (4) of the dividend behind the 15 and repeat the process: 154 / 31

Let's proceed to step 6:
The number 31 fits into 154 4 times, leaving a remainder of 30.
The number 4 becomes the next digit in our result. 
Result so far: 27834.0
If we take 124 away from 154, we end up with 30.
Include the next digit (5) from the dividend after 30, then repeat: 305 / 31

Going ahead to step 7:
305 divided by 31 is 9 with a remainder of 26.
Use 9 as the next digit of our solution. 
Result so far: 278349.0
Subtracting 279 from 305 leaves us with 26.
Take the next digit (7) from the dividend and append it to 26, then repeat: 267 / 31

Moving on to step 8:
31 goes into 267 8 times with a remainder of 19.
Put 8 as the next digit of the answer. 
Result so far: 2783498.0
Deduct 248 from 267 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 9:
When dividing 190 by 31, we get 6 with a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 2783498.6
The remainder is 4 after subtracting 186 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 10:
40 divided by 31 is 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 2783498.61
Subtract 31 from 40 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 11:
The number 31 fits into 90 2 times, leaving a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 2783498.612
The remainder is 28 after subtracting 62 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 12:
31 can be fit into 280 9 times, resulting in a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 2783498.6129
Deduct 279 from 280 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 13:
When dividing 10 by 31, we get 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 2783498.6129
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 14:
31 can be fit into 100 3 times, resulting in a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 2783498.612903
Subtract 93 from 100 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 15:
70 divided by 31 is 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 2783498.6129032
If we take 62 away from 70, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 16:
31 goes into 80 2 times with a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 2783498.61290322
If we take 62 away from 80, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

After the division, we end up with 2783498.61290322 and a remainder of 1.8e-08.