We look at the division of 661785 by 20 
We want to figure out the number of times 661785 can be divided by 20.

Step 1:
20 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 20

Going ahead to step 2:
20 can be fit into 66 3 times, resulting in a remainder of 6.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 6 after subtracting 60 from 66.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 20

Step 3:
The number 20 fits into 61 3 times, leaving a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 33.0
Subtract 60 from 61 to get 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 20

Going ahead to step 4:
If we divide 17 by 20, we get 0 and a remainder of 17.
Use 0 as the next digit of our solution. 
Result so far: 330.0
Deduct 0 from 17 and we're left with 17.
Take the next digit (8) from the dividend and append it to 17, then repeat: 178 / 20

Going ahead to step 5:
20 can be fit into 178 8 times, resulting in a remainder of 18.
Use 8 as the next digit of our solution. 
Result so far: 3308.0
Subtract 160 from 178 to get 18.
Append the next digit (5) from the dividend to 18 and continue with: 185 / 20

Going ahead to step 6:
If we divide 185 by 20, we get 9 and a remainder of 5.
The next digit of our result is 9. 
Result so far: 33089.0
Subtracting 180 from 185 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 7:
When dividing 50 by 20, we get 2 with a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 33089.2
If we take 40 away from 50, 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:
If we divide 100 by 20, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 33089.25
If we take 100 away from 100, 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.

Moving on to step 9:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 33089.25
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.

Step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 33089.25
If we subtract 0 from 0, we 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.

The final outcome is 33089.25, with a leftover of 0.0.