43686471 ÷ 20 
Our goal is to divide 43686471 by 20.

Advancing to step 1:
20 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 20

Going ahead to step 2:
43 divided by 20 is 2 with a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 40 from 43 leaves us with 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 20

Going ahead to step 3:
If we divide 36 by 20, we get 1 and a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 21.0
Subtracting 20 from 36 leaves us with 16.
Append the next digit (8) from the dividend to 16 and continue with: 168 / 20

Step 4:
168 divided by 20 is 8 with a remainder of 8.
Put 8 as the next digit of the answer. 
Result so far: 218.0
The remainder is 8 after subtracting 160 from 168.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 20

Let's proceed to step 5:
When dividing 86 by 20, we get 4 with a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 2184.0
Subtracting 80 from 86 leaves us with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 20

Step 6:
20 goes into 64 3 times with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 21843.0
Deduct 60 from 64 and we're left with 4.
Grab the next digit (7) from the dividend, add it to 4, then carry on: 47 / 20

Step 7:
47 divided by 20 is 2 with a remainder of 7.
The next digit of our result is 2. 
Result so far: 218432.0
Deduct 40 from 47 and we're left with 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 20

Let's proceed to step 8:
The number 20 fits into 71 3 times, leaving a remainder of 11.
The next digit of our result is 3. 
Result so far: 2184323.0
Subtracting 60 from 71 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 9:
20 can be fit into 110 5 times, resulting in a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 2184323.5
Deduct 100 from 110 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.

Moving on to step 10:
100 divided by 20 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 2184323.55
Deduct 100 from 100 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 2184323.55 with a remaining 0.0.