45216240 ÷ 138 
We want to figure out the number of times 45216240 can be divided by 138.

On to step 1:
4 divided by 138 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 138

Let's proceed to step 2:
138 can be fit into 45 0 times, resulting in a remainder of 45.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 45, we get 45.
Bring next digit (2) of the dividend behind the 45 and repeat the process: 452 / 138

Step 3:
452 divided by 138 is 3 with a remainder of 38.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 414 from 452, we get 38.
Fetch the next digit (1) from the dividend, attach it to 38 and continue: 381 / 138

Let's proceed to step 4:
The number 138 fits into 381 2 times, leaving a remainder of 105.
Use 2 as the next digit of our solution. 
Result so far: 32.0
If we take 276 away from 381, we end up with 105.
Bring next digit (6) of the dividend behind the 105 and repeat the process: 1056 / 138

Step 5:
When dividing 1056 by 138, we get 7 with a remainder of 90.
Put 7 as the next digit of the answer. 
Result so far: 327.0
If we subtract 966 from 1056, we get 90.
Take the next digit (2) from the dividend and append it to 90, then repeat: 902 / 138

On to step 6:
If we divide 902 by 138, we get 6 and a remainder of 74.
The number 6 becomes the next digit in our result. 
Result so far: 3276.0
Subtract 828 from 902 to get 74.
Fetch the next digit (4) from the dividend, attach it to 74 and continue: 744 / 138

Step 7:
744 divided by 138 is 5 with a remainder of 54.
Write down 5 as next digit of the result. 
Result so far: 32765.0
Subtracting 690 from 744 leaves us with 54.
Grab the next digit (0) from the dividend, add it to 54, then carry on: 540 / 138

Advancing to step 8:
138 can be fit into 540 3 times, resulting in a remainder of 126.
The next digit of our result is 3. 
Result so far: 327653.0
Subtracting 414 from 540 leaves us with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Advancing to step 9:
If we divide 1260 by 138, we get 9 and a remainder of 18.
The next digit of our result is 9. 
Result so far: 327653.9
Subtract 1242 from 1260 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 10:
180 divided by 138 is 1 with a remainder of 42.
Use 1 as the next digit of our solution. 
Result so far: 327653.91
If we subtract 138 from 180, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 11:
The number 138 fits into 420 3 times, leaving a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 327653.913
Subtracting 414 from 420 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 12:
138 goes into 60 0 times with a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 327653.913
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 13:
When dividing 600 by 138, we get 4 with a remainder of 48.
Put 4 as the next digit of the answer. 
Result so far: 327653.91304
Subtract 552 from 600 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 14:
The number 138 fits into 480 3 times, leaving a remainder of 66.
The next digit of our result is 3. 
Result so far: 327653.913043
If we take 414 away from 480, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 15:
If we divide 660 by 138, we get 4 and a remainder of 108.
Put 4 as the next digit of the answer. 
Result so far: 327653.9130434
The remainder is 108 after subtracting 552 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Let's proceed to step 16:
The number 138 fits into 1080 7 times, leaving a remainder of 114.
Use 7 as the next digit of our solution. 
Result so far: 327653.91304347
If we subtract 966 from 1080, we get 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

The final result is 327653.91304347 with a remainder of 1.14e-07.