216130 ÷ 18 
We want to figure out the number of times 216130 can be divided by 18.

On to step 1:
2 divided by 18 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 18

On to step 2:
21 divided by 18 is 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 18 from 21 and we're left with 3.
Append the next digit (6) from the dividend to 3 and continue with: 36 / 18

Advancing to step 3:
When dividing 36 by 18, we get 2 with a remainder of 0.
The next digit of our result is 2. 
Result so far: 12.0
Subtracting 36 from 36 leaves us with 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 18

Moving on to step 4:
The number 18 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 120.0
If we take 0 away from 1, we end up with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 18

Moving on to step 5:
18 can be fit into 13 0 times, resulting in a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 1200.0
If we subtract 0 from 13, we get 13.
Grab the next digit (0) from the dividend, add it to 13, then carry on: 130 / 18

Step 6:
18 goes into 130 7 times with a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 12007.0
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
18 can be fit into 40 2 times, resulting in a remainder of 4.
The next digit of our result is 2. 
Result so far: 12007.2
If we subtract 36 from 40, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
The number 18 fits into 40 2 times, leaving a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 12007.22
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 12007.22 and a remainder of 0.004.