We look at the division of 42318955 by 285 
We want to divide 42318955 by 285.

Step 1:
The number 285 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 285

On to step 2:
The number 285 fits into 42 0 times, leaving a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Take the next digit (3) from the dividend and append it to 42, then repeat: 423 / 285

On to step 3:
285 goes into 423 1 times with a remainder of 138.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 285 from 423, we get 138.
Grab the next digit (1) from the dividend, add it to 138, then carry on: 1381 / 285

Moving on to step 4:
285 goes into 1381 4 times with a remainder of 241.
Put 4 as the next digit of the answer. 
Result so far: 14.0
Subtracting 1140 from 1381 leaves us with 241.
Include the next digit (8) from the dividend after 241, then repeat: 2418 / 285

On to step 5:
If we divide 2418 by 285, we get 8 and a remainder of 138.
Put 8 as the next digit of the answer. 
Result so far: 148.0
If we take 2280 away from 2418, we end up with 138.
Bring next digit (9) of the dividend behind the 138 and repeat the process: 1389 / 285

Advancing to step 6:
285 can be fit into 1389 4 times, resulting in a remainder of 249.
Write down 4 as next digit of the result. 
Result so far: 1484.0
If we subtract 1140 from 1389, we get 249.
Grab the next digit (5) from the dividend, add it to 249, then carry on: 2495 / 285

Advancing to step 7:
When dividing 2495 by 285, we get 8 with a remainder of 215.
Write down 8 as next digit of the result. 
Result so far: 14848.0
Deduct 2280 from 2495 and we're left with 215.
Take the next digit (5) from the dividend and append it to 215, then repeat: 2155 / 285

Advancing to step 8:
The number 285 fits into 2155 7 times, leaving a remainder of 160.
The next digit of our result is 7. 
Result so far: 148487.0
Subtract 1995 from 2155 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 9:
285 goes into 1600 5 times with a remainder of 175.
Put 5 as the next digit of the answer. 
Result so far: 148487.5
The remainder is 175 after subtracting 1425 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

Let's proceed to step 10:
285 can be fit into 1750 6 times, resulting in a remainder of 40.
Write down 6 as next digit of the result. 
Result so far: 148487.56
Subtract 1710 from 1750 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 11:
When dividing 400 by 285, we get 1 with a remainder of 115.
Use 1 as the next digit of our solution. 
Result so far: 148487.561
If we subtract 285 from 400, we get 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Moving on to step 12:
If we divide 1150 by 285, we get 4 and a remainder of 10.
The next digit of our result is 4. 
Result so far: 148487.5614
If we subtract 1140 from 1150, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 13:
When dividing 100 by 285, we get 0 with a remainder of 100.
Record the quotient 0 as the next digit in the result. 
Result so far: 148487.5614
Subtracting 0 from 100 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

On to step 14:
285 can be fit into 1000 3 times, resulting in a remainder of 145.
The next digit of our result is 3. 
Result so far: 148487.561403
Subtract 855 from 1000 to get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Advancing to step 15:
If we divide 1450 by 285, we get 5 and a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 148487.5614035
If we take 1425 away from 1450, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 16:
The number 285 fits into 250 0 times, leaving a remainder of 250.
Record the quotient 0 as the next digit in the result. 
Result so far: 148487.5614035
The remainder is 250 after subtracting 0 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

The final result is 148487.5614035 with a remainder of 2.5e-07.