Let's divide 86315121 by 366
We're looking to find how many times 366 goes into 86315121.

Let's proceed to step 1:
366 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.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 366

Moving on to step 2:
The number 366 fits into 86 0 times, leaving a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 86, we end up with 86.
Append the next digit (3) from the dividend to 86 and continue with: 863 / 366

On to step 3:
The number 366 fits into 863 2 times, leaving a remainder of 131.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 732 from 863 and we're left with 131.
Append the next digit (1) from the dividend to 131 and continue with: 1311 / 366

Step 4:
366 can be fit into 1311 3 times, resulting in a remainder of 213.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
Subtracting 1098 from 1311 leaves us with 213.
Grab the next digit (5) from the dividend, add it to 213, then carry on: 2135 / 366

Let's proceed to step 5:
If we divide 2135 by 366, we get 5 and a remainder of 305.
Put 5 as the next digit of the answer. 
Result so far: 235.0
If we subtract 1830 from 2135, we get 305.
Take the next digit (1) from the dividend and append it to 305, then repeat: 3051 / 366

Step 6:
When dividing 3051 by 366, we get 8 with a remainder of 123.
The number 8 becomes the next digit in our result. 
Result so far: 2358.0
Deduct 2928 from 3051 and we're left with 123.
Take the next digit (2) from the dividend and append it to 123, then repeat: 1232 / 366

Step 7:
366 goes into 1232 3 times with a remainder of 134.
Put 3 as the next digit of the answer. 
Result so far: 23583.0
If we take 1098 away from 1232, we end up with 134.
Take the next digit (1) from the dividend and append it to 134, then repeat: 1341 / 366

Step 8:
1341 divided by 366 is 3 with a remainder of 243.
Record the quotient 3 as the next digit in the result. 
Result so far: 235833.0
If we subtract 1098 from 1341, we get 243.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2430, and continue the process.

On to step 9:
If we divide 2430 by 366, we get 6 and a remainder of 234.
Put 6 as the next digit of the answer. 
Result so far: 235833.6
If we subtract 2196 from 2430, we get 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Advancing to step 10:
When dividing 2340 by 366, we get 6 with a remainder of 144.
Put 6 as the next digit of the answer. 
Result so far: 235833.66
If we subtract 2196 from 2340, we get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

In conclusion, the division gives 235833.66 with a balance of 0.144.