Let's divide 642493 by 20
Our goal is to divide 642493 by 20.

Let's proceed to step 1:
20 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 20

Going ahead to step 2:
The number 20 fits into 64 3 times, leaving a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 4 after subtracting 60 from 64.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 20

Let's proceed to step 3:
The number 20 fits into 42 2 times, leaving a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 32.0
Subtract 40 from 42 to get 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 20

Moving on to step 4:
20 can be fit into 24 1 times, resulting in a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 321.0
If we subtract 20 from 24, we get 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 20

On to step 5:
If we divide 49 by 20, we get 2 and a remainder of 9.
The number 2 becomes the next digit in our result. 
Result so far: 3212.0
Deduct 40 from 49 and we're left with 9.
Fetch the next digit (3) from the dividend, attach it to 9 and continue: 93 / 20

On to step 6:
93 divided by 20 is 4 with a remainder of 13.
Put 4 as the next digit of the answer. 
Result so far: 32124.0
If we take 80 away from 93, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 7:
If we divide 130 by 20, we get 6 and a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 32124.6
Deduct 120 from 130 and we're left 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:
100 divided by 20 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 32124.65
Subtracting 100 from 100 leaves us 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.

Going ahead to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 32124.65
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.

Step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 32124.65
Subtracting 0 from 0 leaves us 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.

The final outcome is 32124.65, with a leftover of 0.0.