145243 ÷ 20 
We want to figure out the number of times 145243 can be divided by 20.

Moving on to step 1:
If we divide 1 by 20, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 20

Advancing to step 2:
14 divided by 20 is 0 with a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 14 leaves us with 14.
Grab the next digit (5) from the dividend, add it to 14, then carry on: 145 / 20

Advancing to step 3:
20 can be fit into 145 7 times, resulting in a remainder of 5.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we take 140 away from 145, we end up with 5.
Bring next digit (2) of the dividend behind the 5 and repeat the process: 52 / 20

Advancing to step 4:
When dividing 52 by 20, we get 2 with a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 72.0
If we take 40 away from 52, we end up with 12.
Bring next digit (4) of the dividend behind the 12 and repeat the process: 124 / 20

Going ahead to step 5:
If we divide 124 by 20, we get 6 and a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 726.0
The remainder is 4 after subtracting 120 from 124.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 20

Let's proceed to step 6:
20 can be fit into 43 2 times, resulting in a remainder of 3.
Put 2 as the next digit of the answer. 
Result so far: 7262.0
If we subtract 40 from 43, 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.

Moving on to step 7:
20 can be fit into 30 1 times, resulting in a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 7262.1
Subtract 20 from 30 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
The number 20 fits into 100 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 7262.15
The remainder is 0 after subtracting 100 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 7262.15
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
20 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 7262.15
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 7262.15 with a remaining 0.0.