We look at the division of 45311521 by 121 
We want to figure out the number of times 45311521 can be divided by 121.

Let's proceed to step 1:
The number 121 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 121

On to step 2:
121 can be fit into 45 0 times, resulting in a remainder of 45.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 45 to get 45.
Bring next digit (3) of the dividend behind the 45 and repeat the process: 453 / 121

Moving on to step 3:
The number 121 fits into 453 3 times, leaving a remainder of 90.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 363 from 453 leaves us with 90.
Append the next digit (1) from the dividend to 90 and continue with: 901 / 121

Moving on to step 4:
When dividing 901 by 121, we get 7 with a remainder of 54.
The next digit of our result is 7. 
Result so far: 37.0
The remainder is 54 after subtracting 847 from 901.
Fetch the next digit (1) from the dividend, attach it to 54 and continue: 541 / 121

Going ahead to step 5:
When dividing 541 by 121, we get 4 with a remainder of 57.
The next digit of our result is 4. 
Result so far: 374.0
If we take 484 away from 541, we end up with 57.
Bring next digit (5) of the dividend behind the 57 and repeat the process: 575 / 121

Step 6:
If we divide 575 by 121, we get 4 and a remainder of 91.
Record the quotient 4 as the next digit in the result. 
Result so far: 3744.0
The remainder is 91 after subtracting 484 from 575.
Include the next digit (2) from the dividend after 91, then repeat: 912 / 121

Step 7:
121 can be fit into 912 7 times, resulting in a remainder of 65.
The number 7 becomes the next digit in our result. 
Result so far: 37447.0
If we subtract 847 from 912, we get 65.
Take the next digit (1) from the dividend and append it to 65, then repeat: 651 / 121

Moving on to step 8:
121 can be fit into 651 5 times, resulting in a remainder of 46.
Record the quotient 5 as the next digit in the result. 
Result so far: 374475.0
Subtract 605 from 651 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 9:
121 goes into 460 3 times with a remainder of 97.
Put 3 as the next digit of the answer. 
Result so far: 374475.3
If we subtract 363 from 460, we get 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Step 10:
The number 121 fits into 970 8 times, leaving a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 374475.38
Subtracting 968 from 970 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 11:
The number 121 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 374475.38
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 12:
121 goes into 200 1 times with a remainder of 79.
Use 1 as the next digit of our solution. 
Result so far: 374475.3801
Subtracting 121 from 200 leaves us with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

On to step 13:
121 goes into 790 6 times with a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 374475.38016
Subtracting 726 from 790 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 14:
121 goes into 640 5 times with a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 374475.380165
If we take 605 away from 640, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 15:
350 divided by 121 is 2 with a remainder of 108.
Use 2 as the next digit of our solution. 
Result so far: 374475.3801652
Subtract 242 from 350 to get 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Going ahead to step 16:
121 can be fit into 1080 8 times, resulting in a remainder of 112.
Record the quotient 8 as the next digit in the result. 
Result so far: 374475.38016528
Subtract 968 from 1080 to get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

The quotient of the division is 374475.38016528, and the remainder is 1.12e-07.