90423534 divided by 309 
We're looking to find how many times 309 goes into 90423534.

Moving on to step 1:
If we divide 9 by 309, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 309

Moving on to step 2:
309 goes into 90 0 times with a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 90 to get 90.
Grab the next digit (4) from the dividend, add it to 90, then carry on: 904 / 309

Going ahead to step 3:
309 can be fit into 904 2 times, resulting in a remainder of 286.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 618 away from 904, we end up with 286.
Bring next digit (2) of the dividend behind the 286 and repeat the process: 2862 / 309

Let's proceed to step 4:
The number 309 fits into 2862 9 times, leaving a remainder of 81.
The next digit of our result is 9. 
Result so far: 29.0
If we take 2781 away from 2862, we end up with 81.
Bring next digit (3) of the dividend behind the 81 and repeat the process: 813 / 309

Moving on to step 5:
The number 309 fits into 813 2 times, leaving a remainder of 195.
The number 2 becomes the next digit in our result. 
Result so far: 292.0
If we take 618 away from 813, we end up with 195.
Take the next digit (5) from the dividend and append it to 195, then repeat: 1955 / 309

Let's proceed to step 6:
309 goes into 1955 6 times with a remainder of 101.
The number 6 becomes the next digit in our result. 
Result so far: 2926.0
Subtract 1854 from 1955 to get 101.
Bring next digit (3) of the dividend behind the 101 and repeat the process: 1013 / 309

Let's proceed to step 7:
The number 309 fits into 1013 3 times, leaving a remainder of 86.
Record the quotient 3 as the next digit in the result. 
Result so far: 29263.0
The remainder is 86 after subtracting 927 from 1013.
Include the next digit (4) from the dividend after 86, then repeat: 864 / 309

Step 8:
309 goes into 864 2 times with a remainder of 246.
Write down 2 as next digit of the result. 
Result so far: 292632.0
Subtract 618 from 864 to get 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Going ahead to step 9:
309 can be fit into 2460 7 times, resulting in a remainder of 297.
The next digit of our result is 7. 
Result so far: 292632.7
If we take 2163 away from 2460, we end up with 297.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2970, and continue the process.

Step 10:
When dividing 2970 by 309, we get 9 with a remainder of 189.
Record the quotient 9 as the next digit in the result. 
Result so far: 292632.79
Subtracting 2781 from 2970 leaves us with 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

On to step 11:
309 goes into 1890 6 times with a remainder of 36.
Record the quotient 6 as the next digit in the result. 
Result so far: 292632.796
Subtracting 1854 from 1890 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 12:
When dividing 360 by 309, we get 1 with a remainder of 51.
Use 1 as the next digit of our solution. 
Result so far: 292632.7961
The remainder is 51 after subtracting 309 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 13:
309 goes into 510 1 times with a remainder of 201.
Put 1 as the next digit of the answer. 
Result so far: 292632.79611
Subtracting 309 from 510 leaves us with 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

The final result is 292632.79611 with a remainder of 0.000201.