We divide 187399 by 45
We want to figure out the number of times 187399 can be divided by 45.

Let's proceed to step 1:
1 divided by 45 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 45

On to step 2:
When dividing 18 by 45, we get 0 with a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 18 to get 18.
Fetch the next digit (7) from the dividend, attach it to 18 and continue: 187 / 45

On to step 3:
45 can be fit into 187 4 times, resulting in a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Deduct 180 from 187 and we're left with 7.
Grab the next digit (3) from the dividend, add it to 7, then carry on: 73 / 45

Step 4:
When dividing 73 by 45, we get 1 with a remainder of 28.
Use 1 as the next digit of our solution. 
Result so far: 41.0
Deduct 45 from 73 and we're left with 28.
Fetch the next digit (9) from the dividend, attach it to 28 and continue: 289 / 45

On to step 5:
The number 45 fits into 289 6 times, leaving a remainder of 19.
Record the quotient 6 as the next digit in the result. 
Result so far: 416.0
If we subtract 270 from 289, we get 19.
Bring next digit (9) of the dividend behind the 19 and repeat the process: 199 / 45

Going ahead to step 6:
If we divide 199 by 45, we get 4 and a remainder of 19.
The next digit of our result is 4. 
Result so far: 4164.0
If we subtract 180 from 199, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 7:
The number 45 fits into 190 4 times, leaving a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 4164.4
The remainder is 10 after subtracting 180 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
100 divided by 45 is 2 with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 4164.42
If we subtract 90 from 100, 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.

Step 9:
If we divide 100 by 45, we get 2 and a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 4164.422
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 4164.422 with a remainder of 0.001.