64491328 ÷ 121 
We want to figure out the number of times 64491328 can be divided by 121.

Let's proceed to step 1:
The number 121 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 121

Advancing to step 2:
The number 121 fits into 64 0 times, leaving a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Append the next digit (4) from the dividend to 64 and continue with: 644 / 121

Moving on to step 3:
121 can be fit into 644 5 times, resulting in a remainder of 39.
The next digit of our result is 5. 
Result so far: 5.0
Subtracting 605 from 644 leaves us with 39.
Grab the next digit (9) from the dividend, add it to 39, then carry on: 399 / 121

On to step 4:
If we divide 399 by 121, we get 3 and a remainder of 36.
Record the quotient 3 as the next digit in the result. 
Result so far: 53.0
Deduct 363 from 399 and we're left with 36.
Fetch the next digit (1) from the dividend, attach it to 36 and continue: 361 / 121

Let's proceed to step 5:
When dividing 361 by 121, we get 2 with a remainder of 119.
The next digit of our result is 2. 
Result so far: 532.0
If we take 242 away from 361, we end up with 119.
Grab the next digit (3) from the dividend, add it to 119, then carry on: 1193 / 121

Step 6:
If we divide 1193 by 121, we get 9 and a remainder of 104.
Use 9 as the next digit of our solution. 
Result so far: 5329.0
If we subtract 1089 from 1193, we get 104.
Take the next digit (2) from the dividend and append it to 104, then repeat: 1042 / 121

On to step 7:
121 goes into 1042 8 times with a remainder of 74.
The next digit of our result is 8. 
Result so far: 53298.0
Subtract 968 from 1042 to get 74.
Grab the next digit (8) from the dividend, add it to 74, then carry on: 748 / 121

Advancing to step 8:
748 divided by 121 is 6 with a remainder of 22.
Write down 6 as next digit of the result. 
Result so far: 532986.0
Subtracting 726 from 748 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 9:
The number 121 fits into 220 1 times, leaving a remainder of 99.
Record the quotient 1 as the next digit in the result. 
Result so far: 532986.1
Subtracting 121 from 220 leaves us with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Going ahead to step 10:
990 divided by 121 is 8 with a remainder of 22.
Write down 8 as next digit of the result. 
Result so far: 532986.18
Subtract 968 from 990 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 11:
121 goes into 220 1 times with a remainder of 99.
The number 1 becomes the next digit in our result. 
Result so far: 532986.181
Deduct 121 from 220 and we're left with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Going ahead to step 12:
121 goes into 990 8 times with a remainder of 22.
Write down 8 as next digit of the result. 
Result so far: 532986.1818
If we subtract 968 from 990, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 13:
121 can be fit into 220 1 times, resulting in a remainder of 99.
Put 1 as the next digit of the answer. 
Result so far: 532986.18181
The remainder is 99 after subtracting 121 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

On to step 14:
If we divide 990 by 121, we get 8 and a remainder of 22.
The next digit of our result is 8. 
Result so far: 532986.181818
The remainder is 22 after subtracting 968 from 990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 15:
121 goes into 220 1 times with a remainder of 99.
The number 1 becomes the next digit in our result. 
Result so far: 532986.1818181
Subtracting 121 from 220 leaves us with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Let's proceed to step 16:
When dividing 990 by 121, we get 8 with a remainder of 22.
Write down 8 as next digit of the result. 
Result so far: 532986.18181818
If we take 968 away from 990, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Our division results in 532986.18181818 with a remaining 2.2e-08.