87612811 ÷ 20 
Our goal is to divide 87612811 by 20.

Let's proceed to step 1:
8 divided by 20 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 20

Going ahead to step 2:
The number 20 fits into 87 4 times, leaving a remainder of 7.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 80 from 87 leaves us with 7.
Take the next digit (6) from the dividend and append it to 7, then repeat: 76 / 20

Going ahead to step 3:
20 goes into 76 3 times with a remainder of 16.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
If we take 60 away from 76, we end up with 16.
Include the next digit (1) from the dividend after 16, then repeat: 161 / 20

Let's proceed to step 4:
161 divided by 20 is 8 with a remainder of 1.
The next digit of our result is 8. 
Result so far: 438.0
If we take 160 away from 161, we end up with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 20

Let's proceed to step 5:
If we divide 12 by 20, we get 0 and a remainder of 12.
The next digit of our result is 0. 
Result so far: 4380.0
Subtracting 0 from 12 leaves us with 12.
Include the next digit (8) from the dividend after 12, then repeat: 128 / 20

Step 6:
If we divide 128 by 20, we get 6 and a remainder of 8.
The next digit of our result is 6. 
Result so far: 43806.0
Subtracting 120 from 128 leaves us with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 20

Advancing to step 7:
The number 20 fits into 81 4 times, leaving a remainder of 1.
The next digit of our result is 4. 
Result so far: 438064.0
If we take 80 away from 81, we end up with 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 20

Advancing to step 8:
The number 20 fits into 11 0 times, leaving a remainder of 11.
Record the quotient 0 as the next digit in the result. 
Result so far: 4380640.0
Deduct 0 from 11 and we're left 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.

Advancing to step 9:
When dividing 110 by 20, we get 5 with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 4380640.5
The remainder is 10 after subtracting 100 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 10:
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: 4380640.55
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.

After the division, we end up with 4380640.55 and a remainder of 0.0.