We look at the division of 18523721 by 87 
We want to figure out the number of times 18523721 can be divided by 87.

Step 1:
87 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 87

Going ahead to step 2:
When dividing 18 by 87, we get 0 with a remainder of 18.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 18 leaves us with 18.
Grab the next digit (5) from the dividend, add it to 18, then carry on: 185 / 87

Let's proceed to step 3:
The number 87 fits into 185 2 times, leaving a remainder of 11.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 174 from 185 leaves us with 11.
Append the next digit (2) from the dividend to 11 and continue with: 112 / 87

Advancing to step 4:
When dividing 112 by 87, we get 1 with a remainder of 25.
The next digit of our result is 1. 
Result so far: 21.0
The remainder is 25 after subtracting 87 from 112.
Take the next digit (3) from the dividend and append it to 25, then repeat: 253 / 87

Moving on to step 5:
87 can be fit into 253 2 times, resulting in a remainder of 79.
Record the quotient 2 as the next digit in the result. 
Result so far: 212.0
If we take 174 away from 253, we end up with 79.
Append the next digit (7) from the dividend to 79 and continue with: 797 / 87

Advancing to step 6:
87 can be fit into 797 9 times, resulting in a remainder of 14.
The next digit of our result is 9. 
Result so far: 2129.0
Subtracting 783 from 797 leaves us with 14.
Include the next digit (2) from the dividend after 14, then repeat: 142 / 87

Advancing to step 7:
The number 87 fits into 142 1 times, leaving a remainder of 55.
Use 1 as the next digit of our solution. 
Result so far: 21291.0
If we subtract 87 from 142, we get 55.
Grab the next digit (1) from the dividend, add it to 55, then carry on: 551 / 87

Moving on to step 8:
When dividing 551 by 87, we get 6 with a remainder of 29.
The next digit of our result is 6. 
Result so far: 212916.0
If we take 522 away from 551, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 9:
The number 87 fits into 290 3 times, leaving a remainder of 29.
The number 3 becomes the next digit in our result. 
Result so far: 212916.3
The remainder is 29 after subtracting 261 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 10:
If we divide 290 by 87, we get 3 and a remainder of 29.
Record the quotient 3 as the next digit in the result. 
Result so far: 212916.33
Subtract 261 from 290 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

The final outcome is 212916.33, with a leftover of 0.029.