We look at the division of 378493 by 20 
Let's see how many times 20 fits into 378493.

Step 1:
The number 20 fits into 3 0 times, leaving a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Append the next digit (7) from the dividend to 3 and continue with: 37 / 20

Moving on to step 2:
If we divide 37 by 20, we get 1 and a remainder of 17.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 20 from 37 and we're left with 17.
Bring next digit (8) of the dividend behind the 17 and repeat the process: 178 / 20

Let's proceed to step 3:
20 can be fit into 178 8 times, resulting in a remainder of 18.
Put 8 as the next digit of the answer. 
Result so far: 18.0
Deduct 160 from 178 and we're left with 18.
Include the next digit (4) from the dividend after 18, then repeat: 184 / 20

Going ahead to step 4:
20 can be fit into 184 9 times, resulting in a remainder of 4.
Write down 9 as next digit of the result. 
Result so far: 189.0
The remainder is 4 after subtracting 180 from 184.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 20

Going ahead to step 5:
20 can be fit into 49 2 times, resulting in a remainder of 9.
Record the quotient 2 as the next digit in the result. 
Result so far: 1892.0
If we subtract 40 from 49, we get 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 20

Moving on to step 6:
If we divide 93 by 20, we get 4 and a remainder of 13.
The next digit of our result is 4. 
Result so far: 18924.0
Deduct 80 from 93 and we're left 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.

Step 7:
When dividing 130 by 20, we get 6 with a remainder of 10.
The next digit of our result is 6. 
Result so far: 18924.6
If we take 120 away from 130, we end up 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.

On 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: 18924.65
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.

Step 9:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 18924.65
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:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 18924.65
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.

Our division results in 18924.65 with a remaining 0.0.