We look at the division of 20539665 by 143 
We want to figure out the number of times 20539665 can be divided by 143.

Advancing to step 1:
143 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 143

Advancing to step 2:
The number 143 fits into 20 0 times, leaving a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 20, we end up with 20.
Grab the next digit (5) from the dividend, add it to 20, then carry on: 205 / 143

Let's proceed to step 3:
If we divide 205 by 143, we get 1 and a remainder of 62.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 143 away from 205, we end up with 62.
Grab the next digit (3) from the dividend, add it to 62, then carry on: 623 / 143

Going ahead to step 4:
The number 143 fits into 623 4 times, leaving a remainder of 51.
The next digit of our result is 4. 
Result so far: 14.0
Subtracting 572 from 623 leaves us with 51.
Fetch the next digit (9) from the dividend, attach it to 51 and continue: 519 / 143

Advancing to step 5:
When dividing 519 by 143, we get 3 with a remainder of 90.
The number 3 becomes the next digit in our result. 
Result so far: 143.0
Deduct 429 from 519 and we're left with 90.
Append the next digit (6) from the dividend to 90 and continue with: 906 / 143

Advancing to step 6:
906 divided by 143 is 6 with a remainder of 48.
Record the quotient 6 as the next digit in the result. 
Result so far: 1436.0
Subtract 858 from 906 to get 48.
Take the next digit (6) from the dividend and append it to 48, then repeat: 486 / 143

Advancing to step 7:
143 can be fit into 486 3 times, resulting in a remainder of 57.
Put 3 as the next digit of the answer. 
Result so far: 14363.0
The remainder is 57 after subtracting 429 from 486.
Grab the next digit (5) from the dividend, add it to 57, then carry on: 575 / 143

Going ahead to step 8:
The number 143 fits into 575 4 times, leaving a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 143634.0
Subtract 572 from 575 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 9:
143 can be fit into 30 0 times, resulting in a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 143634.0
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 10:
If we divide 300 by 143, we get 2 and a remainder of 14.
Write down 2 as next digit of the result. 
Result so far: 143634.02
Subtracting 286 from 300 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 11:
If we divide 140 by 143, we get 0 and a remainder of 140.
Use 0 as the next digit of our solution. 
Result so far: 143634.02
If we take 0 away from 140, we end up with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Let's proceed to step 12:
1400 divided by 143 is 9 with a remainder of 113.
The number 9 becomes the next digit in our result. 
Result so far: 143634.0209
If we take 1287 away from 1400, we end up with 113.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1130, and continue the process.

Going ahead to step 13:
If we divide 1130 by 143, we get 7 and a remainder of 129.
Put 7 as the next digit of the answer. 
Result so far: 143634.02097
Deduct 1001 from 1130 and we're left with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

Going ahead to step 14:
The number 143 fits into 1290 9 times, leaving a remainder of 3.
The next digit of our result is 9. 
Result so far: 143634.020979
If we subtract 1287 from 1290, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 15:
When dividing 30 by 143, we get 0 with a remainder of 30.
The next digit of our result is 0. 
Result so far: 143634.020979
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 16:
143 goes into 300 2 times with a remainder of 14.
Write down 2 as next digit of the result. 
Result so far: 143634.02097902
Deduct 286 from 300 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final result is 143634.02097902 with a remainder of 1.4e-08.