17520645 divided by 387 
We want to figure out the number of times 17520645 can be divided by 387.

Going ahead to step 1:
The number 387 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (7) from the dividend after 1, then repeat: 17 / 387

On to step 2:
When dividing 17 by 387, we get 0 with a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 17 after subtracting 0 from 17.
Fetch the next digit (5) from the dividend, attach it to 17 and continue: 175 / 387

Moving on to step 3:
387 goes into 175 0 times with a remainder of 175.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 175 leaves us with 175.
Take the next digit (2) from the dividend and append it to 175, then repeat: 1752 / 387

Advancing to step 4:
387 can be fit into 1752 4 times, resulting in a remainder of 204.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 1548 from 1752 and we're left with 204.
Append the next digit (0) from the dividend to 204 and continue with: 2040 / 387

Going ahead to step 5:
When dividing 2040 by 387, we get 5 with a remainder of 105.
Put 5 as the next digit of the answer. 
Result so far: 45.0
If we take 1935 away from 2040, we end up with 105.
Bring next digit (6) of the dividend behind the 105 and repeat the process: 1056 / 387

Step 6:
When dividing 1056 by 387, we get 2 with a remainder of 282.
Use 2 as the next digit of our solution. 
Result so far: 452.0
Deduct 774 from 1056 and we're left with 282.
Bring next digit (4) of the dividend behind the 282 and repeat the process: 2824 / 387

Advancing to step 7:
2824 divided by 387 is 7 with a remainder of 115.
The number 7 becomes the next digit in our result. 
Result so far: 4527.0
Subtracting 2709 from 2824 leaves us with 115.
Bring next digit (5) of the dividend behind the 115 and repeat the process: 1155 / 387

Moving on to step 8:
If we divide 1155 by 387, we get 2 and a remainder of 381.
Use 2 as the next digit of our solution. 
Result so far: 45272.0
Deduct 774 from 1155 and we're left with 381.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3810, and continue the process.

Let's proceed to step 9:
387 can be fit into 3810 9 times, resulting in a remainder of 327.
The number 9 becomes the next digit in our result. 
Result so far: 45272.9
Subtracting 3483 from 3810 leaves us with 327.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3270, and continue the process.

Advancing to step 10:
If we divide 3270 by 387, we get 8 and a remainder of 174.
The number 8 becomes the next digit in our result. 
Result so far: 45272.98
Deduct 3096 from 3270 and we're left with 174.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

Advancing to step 11:
1740 divided by 387 is 4 with a remainder of 192.
The number 4 becomes the next digit in our result. 
Result so far: 45272.984
Subtracting 1548 from 1740 leaves us with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Let's proceed to step 12:
1920 divided by 387 is 4 with a remainder of 372.
Write down 4 as next digit of the result. 
Result so far: 45272.9844
Deduct 1548 from 1920 and we're left with 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

In conclusion, the division gives 45272.9844 with a balance of 0.00372.