We look at the division of 90612691 by 143 
We want to divide 90612691 by 143.

On to step 1:
9 divided by 143 is 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 143

Step 2:
When dividing 90 by 143, we get 0 with a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Grab the next digit (6) from the dividend, add it to 90, then carry on: 906 / 143

Moving on to step 3:
143 can be fit into 906 6 times, resulting in a remainder of 48.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtract 858 from 906 to get 48.
Include the next digit (1) from the dividend after 48, then repeat: 481 / 143

Moving on to step 4:
143 can be fit into 481 3 times, resulting in a remainder of 52.
Write down 3 as next digit of the result. 
Result so far: 63.0
The remainder is 52 after subtracting 429 from 481.
Take the next digit (2) from the dividend and append it to 52, then repeat: 522 / 143

On to step 5:
The number 143 fits into 522 3 times, leaving a remainder of 93.
Write down 3 as next digit of the result. 
Result so far: 633.0
Subtract 429 from 522 to get 93.
Append the next digit (6) from the dividend to 93 and continue with: 936 / 143

Step 6:
143 can be fit into 936 6 times, resulting in a remainder of 78.
Write down 6 as next digit of the result. 
Result so far: 6336.0
The remainder is 78 after subtracting 858 from 936.
Append the next digit (9) from the dividend to 78 and continue with: 789 / 143

Moving on to step 7:
If we divide 789 by 143, we get 5 and a remainder of 74.
Write down 5 as next digit of the result. 
Result so far: 63365.0
If we subtract 715 from 789, we get 74.
Include the next digit (1) from the dividend after 74, then repeat: 741 / 143

Going ahead to step 8:
143 can be fit into 741 5 times, resulting in a remainder of 26.
The number 5 becomes the next digit in our result. 
Result so far: 633655.0
Deduct 715 from 741 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 9:
If we divide 260 by 143, we get 1 and a remainder of 117.
Write down 1 as next digit of the result. 
Result so far: 633655.1
Deduct 143 from 260 and we're left with 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

On to step 10:
If we divide 1170 by 143, we get 8 and a remainder of 26.
Write down 8 as next digit of the result. 
Result so far: 633655.18
Subtracting 1144 from 1170 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 11:
143 goes into 260 1 times with a remainder of 117.
Put 1 as the next digit of the answer. 
Result so far: 633655.181
Subtracting 143 from 260 leaves us with 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

On to step 12:
If we divide 1170 by 143, we get 8 and a remainder of 26.
Use 8 as the next digit of our solution. 
Result so far: 633655.1818
Deduct 1144 from 1170 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 13:
143 goes into 260 1 times with a remainder of 117.
The number 1 becomes the next digit in our result. 
Result so far: 633655.18181
The remainder is 117 after subtracting 143 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Moving on to step 14:
143 can be fit into 1170 8 times, resulting in a remainder of 26.
Use 8 as the next digit of our solution. 
Result so far: 633655.181818
If we subtract 1144 from 1170, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 15:
143 can be fit into 260 1 times, resulting in a remainder of 117.
The next digit of our result is 1. 
Result so far: 633655.1818181
Deduct 143 from 260 and we're left with 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Let's proceed to step 16:
1170 divided by 143 is 8 with a remainder of 26.
Write down 8 as next digit of the result. 
Result so far: 633655.18181818
Deduct 1144 from 1170 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

The final result is 633655.18181818 with a remainder of 2.6e-08.