17637521 divided by 45 
We're looking to find how many times 45 goes into 17637521.

Step 1:
The number 45 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 45

Step 2:
17 divided by 45 is 0 with a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 17, we end up with 17.
Fetch the next digit (6) from the dividend, attach it to 17 and continue: 176 / 45

Advancing to step 3:
45 goes into 176 3 times with a remainder of 41.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 135 from 176 and we're left with 41.
Append the next digit (3) from the dividend to 41 and continue with: 413 / 45

On to step 4:
When dividing 413 by 45, we get 9 with a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 39.0
Subtract 405 from 413 to get 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 45

Advancing to step 5:
The number 45 fits into 87 1 times, leaving a remainder of 42.
Write down 1 as next digit of the result. 
Result so far: 391.0
Subtract 45 from 87 to get 42.
Include the next digit (5) from the dividend after 42, then repeat: 425 / 45

Let's proceed to step 6:
425 divided by 45 is 9 with a remainder of 20.
Put 9 as the next digit of the answer. 
Result so far: 3919.0
Subtracting 405 from 425 leaves us with 20.
Append the next digit (2) from the dividend to 20 and continue with: 202 / 45

Moving on to step 7:
202 divided by 45 is 4 with a remainder of 22.
The next digit of our result is 4. 
Result so far: 39194.0
Deduct 180 from 202 and we're left with 22.
Append the next digit (1) from the dividend to 22 and continue with: 221 / 45

On to step 8:
When dividing 221 by 45, we get 4 with a remainder of 41.
Use 4 as the next digit of our solution. 
Result so far: 391944.0
If we take 180 away from 221, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Moving on to step 9:
410 divided by 45 is 9 with a remainder of 5.
Write down 9 as next digit of the result. 
Result so far: 391944.9
The remainder is 5 after subtracting 405 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 10:
If we divide 50 by 45, we get 1 and a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 391944.91
If we subtract 45 from 50, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 11:
50 divided by 45 is 1 with a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 391944.911
If we subtract 45 from 50, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final outcome is 391944.911, with a leftover of 0.0005.