90399666 divided by 143 
We want to divide 90399666 by 143.

Step 1:
143 goes into 9 0 times with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 143

Let's proceed to step 2:
When dividing 90 by 143, we get 0 with a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 90 to get 90.
Fetch the next digit (3) from the dividend, attach it to 90 and continue: 903 / 143

Moving on to step 3:
143 can be fit into 903 6 times, resulting in a remainder of 45.
The next digit of our result is 6. 
Result so far: 6.0
The remainder is 45 after subtracting 858 from 903.
Fetch the next digit (9) from the dividend, attach it to 45 and continue: 459 / 143

On to step 4:
If we divide 459 by 143, we get 3 and a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 63.0
If we subtract 429 from 459, we get 30.
Append the next digit (9) from the dividend to 30 and continue with: 309 / 143

Going ahead to step 5:
When dividing 309 by 143, we get 2 with a remainder of 23.
Write down 2 as next digit of the result. 
Result so far: 632.0
Subtract 286 from 309 to get 23.
Take the next digit (6) from the dividend and append it to 23, then repeat: 236 / 143

On to step 6:
236 divided by 143 is 1 with a remainder of 93.
The next digit of our result is 1. 
Result so far: 6321.0
Subtracting 143 from 236 leaves us with 93.
Include the next digit (6) from the dividend after 93, then repeat: 936 / 143

On to step 7:
The number 143 fits into 936 6 times, leaving a remainder of 78.
The number 6 becomes the next digit in our result. 
Result so far: 63216.0
The remainder is 78 after subtracting 858 from 936.
Append the next digit (6) from the dividend to 78 and continue with: 786 / 143

Advancing to step 8:
The number 143 fits into 786 5 times, leaving a remainder of 71.
Record the quotient 5 as the next digit in the result. 
Result so far: 632165.0
If we take 715 away from 786, we end up with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Advancing to step 9:
If we divide 710 by 143, we get 4 and a remainder of 138.
Write down 4 as next digit of the result. 
Result so far: 632165.4
If we take 572 away from 710, we end up with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Step 10:
143 can be fit into 1380 9 times, resulting in a remainder of 93.
Use 9 as the next digit of our solution. 
Result so far: 632165.49
If we subtract 1287 from 1380, we get 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Moving on to step 11:
143 goes into 930 6 times with a remainder of 72.
The number 6 becomes the next digit in our result. 
Result so far: 632165.496
If we take 858 away from 930, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 12:
143 goes into 720 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 632165.4965
If we take 715 away from 720, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 13:
143 goes into 50 0 times with a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 632165.4965
Deduct 0 from 50 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 14:
The number 143 fits into 500 3 times, leaving a remainder of 71.
The number 3 becomes the next digit in our result. 
Result so far: 632165.496503
If we take 429 away from 500, we end up with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Advancing to step 15:
When dividing 710 by 143, we get 4 with a remainder of 138.
Use 4 as the next digit of our solution. 
Result so far: 632165.4965034
Subtract 572 from 710 to get 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

On to step 16:
143 can be fit into 1380 9 times, resulting in a remainder of 93.
Put 9 as the next digit of the answer. 
Result so far: 632165.49650349
Deduct 1287 from 1380 and we're left with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

In conclusion, the division gives 632165.49650349 with a balance of 9.3e-08.