We look at the division of 643443 by 30 
We want to divide 643443 by 30.

Advancing to step 1:
30 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 30

Let's proceed to step 2:
The number 30 fits into 64 2 times, leaving a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 4 after subtracting 60 from 64.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 30

Moving on to step 3:
30 goes into 43 1 times with a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 21.0
If we take 30 away from 43, we end up with 13.
Include the next digit (4) from the dividend after 13, then repeat: 134 / 30

Advancing to step 4:
If we divide 134 by 30, we get 4 and a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 214.0
Subtract 120 from 134 to get 14.
Take the next digit (4) from the dividend and append it to 14, then repeat: 144 / 30

Advancing to step 5:
144 divided by 30 is 4 with a remainder of 24.
The next digit of our result is 4. 
Result so far: 2144.0
Subtracting 120 from 144 leaves us with 24.
Take the next digit (3) from the dividend and append it to 24, then repeat: 243 / 30

Let's proceed to step 6:
When dividing 243 by 30, we get 8 with a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 21448.0
If we take 240 away from 243, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 7:
30 can be fit into 30 1 times, resulting in a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 21448.1
Subtract 30 from 30 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
0 divided by 30 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 21448.1
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
30 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 21448.1
If we take 0 away from 0, we end up 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.

The final outcome is 21448.1, with a leftover of 0.0.