We look at the division of 436989 by 42 
We're looking to find how many times 42 goes into 436989.

Let's proceed to step 1:
42 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 42

Step 2:
If we divide 43 by 42, we get 1 and a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 42 from 43 leaves us with 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 42

Moving on to step 3:
42 can be fit into 16 0 times, resulting in a remainder of 16.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we subtract 0 from 16, we get 16.
Fetch the next digit (9) from the dividend, attach it to 16 and continue: 169 / 42

Moving on to step 4:
If we divide 169 by 42, we get 4 and a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 104.0
Deduct 168 from 169 and we're left with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 42

On to step 5:
42 goes into 18 0 times with a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 1040.0
The remainder is 18 after subtracting 0 from 18.
Bring next digit (9) of the dividend behind the 18 and repeat the process: 189 / 42

On to step 6:
If we divide 189 by 42, we get 4 and a remainder of 21.
Put 4 as the next digit of the answer. 
Result so far: 10404.0
If we take 168 away from 189, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 7:
42 goes into 210 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 10404.5
Subtract 210 from 210 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.

Step 8:
When dividing 0 by 42, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 10404.5
Deduct 0 from 0 and we're left 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.

Moving on to step 9:
42 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10404.5
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 10404.5, with a leftover of 0.0.