We divide 645972 by 18
We want to figure out the number of times 645972 can be divided by 18.

Moving on to step 1:
18 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 18

Advancing to step 2:
If we divide 64 by 18, we get 3 and a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 54 from 64 leaves us with 10.
Take the next digit (5) from the dividend and append it to 10, then repeat: 105 / 18

Going ahead to step 3:
18 can be fit into 105 5 times, resulting in a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
Subtract 90 from 105 to get 15.
Bring next digit (9) of the dividend behind the 15 and repeat the process: 159 / 18

Let's proceed to step 4:
When dividing 159 by 18, we get 8 with a remainder of 15.
Put 8 as the next digit of the answer. 
Result so far: 358.0
Deduct 144 from 159 and we're left with 15.
Fetch the next digit (7) from the dividend, attach it to 15 and continue: 157 / 18

Advancing to step 5:
When dividing 157 by 18, we get 8 with a remainder of 13.
The next digit of our result is 8. 
Result so far: 3588.0
The remainder is 13 after subtracting 144 from 157.
Append the next digit (2) from the dividend to 13 and continue with: 132 / 18

Advancing to step 6:
132 divided by 18 is 7 with a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 35887.0
Subtract 126 from 132 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 7:
The number 18 fits into 60 3 times, leaving a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 35887.3
Subtract 54 from 60 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 8:
60 divided by 18 is 3 with a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 35887.33
Subtract 54 from 60 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The quotient of the division is 35887.33, and the remainder is 0.006.