98995638 ÷ 645 
We want to figure out the number of times 98995638 can be divided by 645.

Going ahead to step 1:
645 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 645

Let's proceed to step 2:
The number 645 fits into 98 0 times, leaving a remainder of 98.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 98 and we're left with 98.
Grab the next digit (9) from the dividend, add it to 98, then carry on: 989 / 645

Step 3:
989 divided by 645 is 1 with a remainder of 344.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 645 from 989 and we're left with 344.
Append the next digit (9) from the dividend to 344 and continue with: 3449 / 645

Let's proceed to step 4:
3449 divided by 645 is 5 with a remainder of 224.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Deduct 3225 from 3449 and we're left with 224.
Append the next digit (5) from the dividend to 224 and continue with: 2245 / 645

Let's proceed to step 5:
645 can be fit into 2245 3 times, resulting in a remainder of 310.
Use 3 as the next digit of our solution. 
Result so far: 153.0
The remainder is 310 after subtracting 1935 from 2245.
Take the next digit (6) from the dividend and append it to 310, then repeat: 3106 / 645

Advancing to step 6:
If we divide 3106 by 645, we get 4 and a remainder of 526.
The next digit of our result is 4. 
Result so far: 1534.0
Deduct 2580 from 3106 and we're left with 526.
Fetch the next digit (3) from the dividend, attach it to 526 and continue: 5263 / 645

Step 7:
645 goes into 5263 8 times with a remainder of 103.
Record the quotient 8 as the next digit in the result. 
Result so far: 15348.0
If we take 5160 away from 5263, we end up with 103.
Append the next digit (8) from the dividend to 103 and continue with: 1038 / 645

Going ahead to step 8:
The number 645 fits into 1038 1 times, leaving a remainder of 393.
The number 1 becomes the next digit in our result. 
Result so far: 153481.0
Subtract 645 from 1038 to get 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

On to step 9:
The number 645 fits into 3930 6 times, leaving a remainder of 60.
Record the quotient 6 as the next digit in the result. 
Result so far: 153481.6
If we subtract 3870 from 3930, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 10:
600 divided by 645 is 0 with a remainder of 600.
Use 0 as the next digit of our solution. 
Result so far: 153481.6
Subtracting 0 from 600 leaves us with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

On to step 11:
When dividing 6000 by 645, we get 9 with a remainder of 195.
Record the quotient 9 as the next digit in the result. 
Result so far: 153481.609
If we take 5805 away from 6000, we end up with 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Moving on to step 12:
1950 divided by 645 is 3 with a remainder of 15.
Write down 3 as next digit of the result. 
Result so far: 153481.6093
Subtracting 1935 from 1950 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 13:
When dividing 150 by 645, we get 0 with a remainder of 150.
The next digit of our result is 0. 
Result so far: 153481.6093
If we take 0 away from 150, we end up with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Let's proceed to step 14:
The number 645 fits into 1500 2 times, leaving a remainder of 210.
Use 2 as the next digit of our solution. 
Result so far: 153481.609302
The remainder is 210 after subtracting 1290 from 1500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Moving on to step 15:
645 goes into 2100 3 times with a remainder of 165.
The next digit of our result is 3. 
Result so far: 153481.6093023
Deduct 1935 from 2100 and we're left with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Moving on to step 16:
1650 divided by 645 is 2 with a remainder of 360.
The next digit of our result is 2. 
Result so far: 153481.60930232
Deduct 1290 from 1650 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

After the division, we end up with 153481.60930232 and a remainder of 3.6e-07.