We divide 31661 by 20
We want to figure out the number of times 31661 can be divided by 20.

Let's proceed to step 1:
20 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 20

Step 2:
31 divided by 20 is 1 with a remainder of 11.
The next digit of our result is 1. 
Result so far: 1.0
If we take 20 away from 31, we end up with 11.
Bring next digit (6) of the dividend behind the 11 and repeat the process: 116 / 20

Step 3:
The number 20 fits into 116 5 times, leaving a remainder of 16.
Write down 5 as next digit of the result. 
Result so far: 15.0
The remainder is 16 after subtracting 100 from 116.
Take the next digit (6) from the dividend and append it to 16, then repeat: 166 / 20

Moving on to step 4:
20 goes into 166 8 times with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 158.0
The remainder is 6 after subtracting 160 from 166.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 20

Moving on to step 5:
When dividing 61 by 20, we get 3 with a remainder of 1.
The next digit of our result is 3. 
Result so far: 1583.0
Subtracting 60 from 61 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 6:
When dividing 10 by 20, we get 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 1583.0
The remainder is 10 after subtracting 0 from 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 7:
20 can be fit into 100 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 1583.05
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 8:
When dividing 0 by 20, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1583.05
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.

Let's proceed 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: 1583.05
Deduct 0 from 0 and we're left 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 1583.05 with a remaining 0.0.