We divide 70321 by 18
We want to figure out the number of times 70321 can be divided by 18.

Advancing to step 1:
18 can be fit into 7 0 times, resulting in a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (0) from the dividend, add it to 7, then carry on: 70 / 18

On to step 2:
The number 18 fits into 70 3 times, leaving a remainder of 16.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 54 away from 70, we end up with 16.
Include the next digit (3) from the dividend after 16, then repeat: 163 / 18

Step 3:
163 divided by 18 is 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
Deduct 162 from 163 and we're left with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 18

Going ahead to step 4:
18 goes into 12 0 times with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 390.0
If we take 0 away from 12, we end up with 12.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 18

Moving on to step 5:
18 can be fit into 121 6 times, resulting in a remainder of 13.
The number 6 becomes the next digit in our result. 
Result so far: 3906.0
If we subtract 108 from 121, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 6:
130 divided by 18 is 7 with a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 3906.7
Subtract 126 from 130 to 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.

Advancing to step 7:
The number 18 fits into 40 2 times, leaving a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 3906.72
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.

Moving on to step 8:
18 can be fit into 40 2 times, resulting in a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 3906.722
Deduct 36 from 40 and we're left 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.

Our division results in 3906.722 with a remaining 0.0004.