Let's divide 90378609 by 279
Our goal is to divide 90378609 by 279.

Going ahead to step 1:
279 goes into 9 0 times with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 279

On to step 2:
The number 279 fits into 90 0 times, leaving a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 90 to get 90.
Take the next digit (3) from the dividend and append it to 90, then repeat: 903 / 279

On to step 3:
When dividing 903 by 279, we get 3 with a remainder of 66.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 66 after subtracting 837 from 903.
Take the next digit (7) from the dividend and append it to 66, then repeat: 667 / 279

On to step 4:
If we divide 667 by 279, we get 2 and a remainder of 109.
Record the quotient 2 as the next digit in the result. 
Result so far: 32.0
If we take 558 away from 667, we end up with 109.
Append the next digit (8) from the dividend to 109 and continue with: 1098 / 279

Advancing to step 5:
The number 279 fits into 1098 3 times, leaving a remainder of 261.
The next digit of our result is 3. 
Result so far: 323.0
Subtracting 837 from 1098 leaves us with 261.
Bring next digit (6) of the dividend behind the 261 and repeat the process: 2616 / 279

On to step 6:
279 goes into 2616 9 times with a remainder of 105.
Use 9 as the next digit of our solution. 
Result so far: 3239.0
Deduct 2511 from 2616 and we're left with 105.
Append the next digit (0) from the dividend to 105 and continue with: 1050 / 279

Step 7:
279 can be fit into 1050 3 times, resulting in a remainder of 213.
The next digit of our result is 3. 
Result so far: 32393.0
If we subtract 837 from 1050, we get 213.
Fetch the next digit (9) from the dividend, attach it to 213 and continue: 2139 / 279

Advancing to step 8:
279 can be fit into 2139 7 times, resulting in a remainder of 186.
The next digit of our result is 7. 
Result so far: 323937.0
If we subtract 1953 from 2139, we get 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

Advancing to step 9:
When dividing 1860 by 279, we get 6 with a remainder of 186.
Write down 6 as next digit of the result. 
Result so far: 323937.6
The remainder is 186 after subtracting 1674 from 1860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

On to step 10:
279 can be fit into 1860 6 times, resulting in a remainder of 186.
The next digit of our result is 6. 
Result so far: 323937.66
If we subtract 1674 from 1860, we get 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

In conclusion, the division gives 323937.66 with a balance of 0.186.