We divide 860420 by 45
We want to figure out the number of times 860420 can be divided by 45.

Going ahead to step 1:
The number 45 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 45

Advancing to step 2:
When dividing 86 by 45, we get 1 with a remainder of 41.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 41 after subtracting 45 from 86.
Grab the next digit (0) from the dividend, add it to 41, then carry on: 410 / 45

On to step 3:
45 goes into 410 9 times with a remainder of 5.
Write down 9 as next digit of the result. 
Result so far: 19.0
If we take 405 away from 410, we end up with 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 45

Advancing to step 4:
45 goes into 54 1 times with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 191.0
Subtracting 45 from 54 leaves us with 9.
Bring next digit (2) of the dividend behind the 9 and repeat the process: 92 / 45

On to step 5:
45 goes into 92 2 times with a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 1912.0
If we take 90 away from 92, we end up with 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 45

Moving on to step 6:
20 divided by 45 is 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 19120.0
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 7:
If we divide 200 by 45, we get 4 and a remainder of 20.
Put 4 as the next digit of the answer. 
Result so far: 19120.4
Subtracting 180 from 200 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 8:
200 divided by 45 is 4 with a remainder of 20.
Write down 4 as next digit of the result. 
Result so far: 19120.44
Subtract 180 from 200 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 19120.44, with a leftover of 0.02.