159943 divided by 20 
We're looking to find how many times 20 goes into 159943.

Step 1:
The number 20 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 20

On to step 2:
When dividing 15 by 20, we get 0 with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 20

Going ahead to step 3:
20 goes into 159 7 times with a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
The remainder is 19 after subtracting 140 from 159.
Bring next digit (9) of the dividend behind the 19 and repeat the process: 199 / 20

Let's proceed to step 4:
If we divide 199 by 20, we get 9 and a remainder of 19.
Put 9 as the next digit of the answer. 
Result so far: 79.0
If we take 180 away from 199, we end up with 19.
Include the next digit (4) from the dividend after 19, then repeat: 194 / 20

Advancing to step 5:
When dividing 194 by 20, we get 9 with a remainder of 14.
Record the quotient 9 as the next digit in the result. 
Result so far: 799.0
Subtract 180 from 194 to get 14.
Take the next digit (3) from the dividend and append it to 14, then repeat: 143 / 20

Step 6:
20 can be fit into 143 7 times, resulting in a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 7997.0
Deduct 140 from 143 and we're left with 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 7:
The number 20 fits into 30 1 times, leaving a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 7997.1
Subtracting 20 from 30 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
When dividing 100 by 20, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 7997.15
Subtract 100 from 100 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.

Going ahead to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 7997.15
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.

Going ahead 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: 7997.15
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 7997.15 with a balance of 0.0.