We're dividing 90961529 by 143 
We want to figure out the number of times 90961529 can be divided by 143.

Moving on to step 1:
9 divided by 143 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 143

Moving on to step 2:
90 divided by 143 is 0 with a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Include the next digit (9) from the dividend after 90, then repeat: 909 / 143

Advancing to step 3:
143 goes into 909 6 times with a remainder of 51.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we take 858 away from 909, we end up with 51.
Include the next digit (6) from the dividend after 51, then repeat: 516 / 143

Going ahead to step 4:
The number 143 fits into 516 3 times, leaving a remainder of 87.
The number 3 becomes the next digit in our result. 
Result so far: 63.0
If we subtract 429 from 516, we get 87.
Include the next digit (1) from the dividend after 87, then repeat: 871 / 143

Step 5:
The number 143 fits into 871 6 times, leaving a remainder of 13.
The number 6 becomes the next digit in our result. 
Result so far: 636.0
Subtract 858 from 871 to get 13.
Bring next digit (5) of the dividend behind the 13 and repeat the process: 135 / 143

Let's proceed to step 6:
The number 143 fits into 135 0 times, leaving a remainder of 135.
Put 0 as the next digit of the answer. 
Result so far: 6360.0
If we subtract 0 from 135, we get 135.
Fetch the next digit (2) from the dividend, attach it to 135 and continue: 1352 / 143

Let's proceed to step 7:
143 can be fit into 1352 9 times, resulting in a remainder of 65.
Write down 9 as next digit of the result. 
Result so far: 63609.0
If we take 1287 away from 1352, we end up with 65.
Grab the next digit (9) from the dividend, add it to 65, then carry on: 659 / 143

Going ahead to step 8:
When dividing 659 by 143, we get 4 with a remainder of 87.
Use 4 as the next digit of our solution. 
Result so far: 636094.0
Deduct 572 from 659 and we're left with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

On to step 9:
143 can be fit into 870 6 times, resulting in a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 636094.6
Subtracting 858 from 870 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 10:
143 can be fit into 120 0 times, resulting in a remainder of 120.
The next digit of our result is 0. 
Result so far: 636094.6
Subtracting 0 from 120 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 11:
If we divide 1200 by 143, we get 8 and a remainder of 56.
Record the quotient 8 as the next digit in the result. 
Result so far: 636094.608
If we take 1144 away from 1200, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 12:
If we divide 560 by 143, we get 3 and a remainder of 131.
The next digit of our result is 3. 
Result so far: 636094.6083
The remainder is 131 after subtracting 429 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Advancing to step 13:
When dividing 1310 by 143, we get 9 with a remainder of 23.
Record the quotient 9 as the next digit in the result. 
Result so far: 636094.60839
If we take 1287 away from 1310, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 14:
The number 143 fits into 230 1 times, leaving a remainder of 87.
The next digit of our result is 1. 
Result so far: 636094.608391
If we take 143 away from 230, we end up with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Advancing to step 15:
When dividing 870 by 143, we get 6 with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 636094.6083916
The remainder is 12 after subtracting 858 from 870.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 16:
The number 143 fits into 120 0 times, leaving a remainder of 120.
Put 0 as the next digit of the answer. 
Result so far: 636094.6083916
If we subtract 0 from 120, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

The final outcome is 636094.6083916, with a leftover of 1.2e-07.