We divide 9889286 by 645
We want to figure out the number of times 9889286 can be divided by 645.

Step 1:
If we divide 9 by 645, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 645

Advancing to step 2:
98 divided by 645 is 0 with a remainder of 98.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 98, we end up with 98.
Append the next digit (8) from the dividend to 98 and continue with: 988 / 645

Step 3:
When dividing 988 by 645, we get 1 with a remainder of 343.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 645 from 988 to get 343.
Append the next digit (9) from the dividend to 343 and continue with: 3439 / 645

Moving on to step 4:
645 can be fit into 3439 5 times, resulting in a remainder of 214.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
If we subtract 3225 from 3439, we get 214.
Append the next digit (2) from the dividend to 214 and continue with: 2142 / 645

Moving on to step 5:
645 goes into 2142 3 times with a remainder of 207.
The next digit of our result is 3. 
Result so far: 153.0
If we subtract 1935 from 2142, we get 207.
Grab the next digit (8) from the dividend, add it to 207, then carry on: 2078 / 645

Step 6:
2078 divided by 645 is 3 with a remainder of 143.
Record the quotient 3 as the next digit in the result. 
Result so far: 1533.0
If we take 1935 away from 2078, we end up with 143.
Fetch the next digit (6) from the dividend, attach it to 143 and continue: 1436 / 645

Advancing to step 7:
645 goes into 1436 2 times with a remainder of 146.
Write down 2 as next digit of the result. 
Result so far: 15332.0
Deduct 1290 from 1436 and we're left with 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Advancing to step 8:
The number 645 fits into 1460 2 times, leaving a remainder of 170.
Put 2 as the next digit of the answer. 
Result so far: 15332.2
The remainder is 170 after subtracting 1290 from 1460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Let's proceed to step 9:
1700 divided by 645 is 2 with a remainder of 410.
Put 2 as the next digit of the answer. 
Result so far: 15332.22
Subtracting 1290 from 1700 leaves us with 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Our division results in 15332.22 with a remaining 0.41.