858316 ÷ 45 
Let's see how many times 45 fits into 858316.

Advancing to step 1:
8 divided by 45 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (5) of the dividend behind the 8 and repeat the process: 85 / 45

Advancing to step 2:
45 can be fit into 85 1 times, resulting in a remainder of 40.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 45 from 85 to get 40.
Append the next digit (8) from the dividend to 40 and continue with: 408 / 45

Let's proceed to step 3:
45 goes into 408 9 times with a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Deduct 405 from 408 and we're left with 3.
Grab the next digit (3) from the dividend, add it to 3, then carry on: 33 / 45

Let's proceed to step 4:
If we divide 33 by 45, we get 0 and a remainder of 33.
Write down 0 as next digit of the result. 
Result so far: 190.0
If we take 0 away from 33, we end up with 33.
Take the next digit (1) from the dividend and append it to 33, then repeat: 331 / 45

Let's proceed to step 5:
45 can be fit into 331 7 times, resulting in a remainder of 16.
The number 7 becomes the next digit in our result. 
Result so far: 1907.0
Deduct 315 from 331 and we're left with 16.
Include the next digit (6) from the dividend after 16, then repeat: 166 / 45

Step 6:
The number 45 fits into 166 3 times, leaving a remainder of 31.
Write down 3 as next digit of the result. 
Result so far: 19073.0
The remainder is 31 after subtracting 135 from 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Step 7:
If we divide 310 by 45, we get 6 and a remainder of 40.
The next digit of our result is 6. 
Result so far: 19073.6
The remainder is 40 after subtracting 270 from 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 8:
400 divided by 45 is 8 with a remainder of 40.
Record the quotient 8 as the next digit in the result. 
Result so far: 19073.68
If we take 360 away from 400, we end up with 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 9:
When dividing 400 by 45, we get 8 with a remainder of 40.
Put 8 as the next digit of the answer. 
Result so far: 19073.688
Subtracting 360 from 400 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final result is 19073.688 with a remainder of 0.004.