Let's divide 8391509 by 445
We want to figure out the number of times 8391509 can be divided by 445.

On to step 1:
If we divide 8 by 445, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 445

Going ahead to step 2:
The number 445 fits into 83 0 times, leaving a remainder of 83.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 83 to get 83.
Take the next digit (9) from the dividend and append it to 83, then repeat: 839 / 445

Moving on to step 3:
445 can be fit into 839 1 times, resulting in a remainder of 394.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 445 from 839 and we're left with 394.
Take the next digit (1) from the dividend and append it to 394, then repeat: 3941 / 445

Step 4:
The number 445 fits into 3941 8 times, leaving a remainder of 381.
Use 8 as the next digit of our solution. 
Result so far: 18.0
Subtract 3560 from 3941 to get 381.
Include the next digit (5) from the dividend after 381, then repeat: 3815 / 445

On to step 5:
3815 divided by 445 is 8 with a remainder of 255.
Record the quotient 8 as the next digit in the result. 
Result so far: 188.0
Subtract 3560 from 3815 to get 255.
Grab the next digit (0) from the dividend, add it to 255, then carry on: 2550 / 445

On to step 6:
445 can be fit into 2550 5 times, resulting in a remainder of 325.
The next digit of our result is 5. 
Result so far: 1885.0
Subtracting 2225 from 2550 leaves us with 325.
Include the next digit (9) from the dividend after 325, then repeat: 3259 / 445

Step 7:
If we divide 3259 by 445, we get 7 and a remainder of 144.
The number 7 becomes the next digit in our result. 
Result so far: 18857.0
If we subtract 3115 from 3259, we get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Let's proceed to step 8:
When dividing 1440 by 445, we get 3 with a remainder of 105.
The next digit of our result is 3. 
Result so far: 18857.3
If we subtract 1335 from 1440, we get 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

On to step 9:
445 can be fit into 1050 2 times, resulting in a remainder of 160.
Record the quotient 2 as the next digit in the result. 
Result so far: 18857.32
Subtract 890 from 1050 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.

On to step 10:
445 can be fit into 1600 3 times, resulting in a remainder of 265.
Put 3 as the next digit of the answer. 
Result so far: 18857.323
Subtracting 1335 from 1600 leaves us with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Advancing to step 11:
The number 445 fits into 2650 5 times, leaving a remainder of 425.
The next digit of our result is 5. 
Result so far: 18857.3235
If we take 2225 away from 2650, we end up with 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

On to step 12:
If we divide 4250 by 445, we get 9 and a remainder of 245.
Record the quotient 9 as the next digit in the result. 
Result so far: 18857.32359
The remainder is 245 after subtracting 4005 from 4250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Step 13:
If we divide 2450 by 445, we get 5 and a remainder of 225.
Record the quotient 5 as the next digit in the result. 
Result so far: 18857.323595
Subtracting 2225 from 2450 leaves us with 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Moving on to step 14:
2250 divided by 445 is 5 with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 18857.3235955
Deduct 2225 from 2250 and we're left 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.

In conclusion, the division gives 18857.3235955 with a balance of 2.5e-07.