We're dividing 90306563 by 312 
Let's see how many times 312 fits into 90306563.

Let's proceed to step 1:
9 divided by 312 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 312

Going ahead to step 2:
312 can be fit into 90 0 times, resulting in a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 90 and we're left with 90.
Grab the next digit (3) from the dividend, add it to 90, then carry on: 903 / 312

Going ahead to step 3:
The number 312 fits into 903 2 times, leaving a remainder of 279.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 624 from 903, we get 279.
Append the next digit (0) from the dividend to 279 and continue with: 2790 / 312

Let's proceed to step 4:
2790 divided by 312 is 8 with a remainder of 294.
Record the quotient 8 as the next digit in the result. 
Result so far: 28.0
If we take 2496 away from 2790, we end up with 294.
Append the next digit (6) from the dividend to 294 and continue with: 2946 / 312

On to step 5:
312 goes into 2946 9 times with a remainder of 138.
Write down 9 as next digit of the result. 
Result so far: 289.0
Subtracting 2808 from 2946 leaves us with 138.
Grab the next digit (5) from the dividend, add it to 138, then carry on: 1385 / 312

Step 6:
The number 312 fits into 1385 4 times, leaving a remainder of 137.
The number 4 becomes the next digit in our result. 
Result so far: 2894.0
Subtract 1248 from 1385 to get 137.
Append the next digit (6) from the dividend to 137 and continue with: 1376 / 312

Moving on to step 7:
The number 312 fits into 1376 4 times, leaving a remainder of 128.
Put 4 as the next digit of the answer. 
Result so far: 28944.0
Subtracting 1248 from 1376 leaves us with 128.
Fetch the next digit (3) from the dividend, attach it to 128 and continue: 1283 / 312

Let's proceed to step 8:
312 can be fit into 1283 4 times, resulting in a remainder of 35.
Put 4 as the next digit of the answer. 
Result so far: 289444.0
Subtract 1248 from 1283 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 9:
When dividing 350 by 312, we get 1 with a remainder of 38.
Record the quotient 1 as the next digit in the result. 
Result so far: 289444.1
Subtract 312 from 350 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 10:
312 goes into 380 1 times with a remainder of 68.
Write down 1 as next digit of the result. 
Result so far: 289444.11
Subtracting 312 from 380 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

In conclusion, the division gives 289444.11 with a balance of 0.068.