55215538 ÷ 660 
We want to figure out the number of times 55215538 can be divided by 660.

Step 1:
660 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 660

Step 2:
If we divide 55 by 660, we get 0 and a remainder of 55.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 55 and we're left with 55.
Append the next digit (2) from the dividend to 55 and continue with: 552 / 660

Let's proceed to step 3:
552 divided by 660 is 0 with a remainder of 552.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 552, we get 552.
Fetch the next digit (1) from the dividend, attach it to 552 and continue: 5521 / 660

Moving on to step 4:
660 can be fit into 5521 8 times, resulting in a remainder of 241.
The next digit of our result is 8. 
Result so far: 8.0
If we subtract 5280 from 5521, we get 241.
Take the next digit (5) from the dividend and append it to 241, then repeat: 2415 / 660

Going ahead to step 5:
2415 divided by 660 is 3 with a remainder of 435.
Put 3 as the next digit of the answer. 
Result so far: 83.0
Deduct 1980 from 2415 and we're left with 435.
Grab the next digit (5) from the dividend, add it to 435, then carry on: 4355 / 660

Advancing to step 6:
The number 660 fits into 4355 6 times, leaving a remainder of 395.
The next digit of our result is 6. 
Result so far: 836.0
Deduct 3960 from 4355 and we're left with 395.
Include the next digit (3) from the dividend after 395, then repeat: 3953 / 660

On to step 7:
If we divide 3953 by 660, we get 5 and a remainder of 653.
Record the quotient 5 as the next digit in the result. 
Result so far: 8365.0
Deduct 3300 from 3953 and we're left with 653.
Include the next digit (8) from the dividend after 653, then repeat: 6538 / 660

On to step 8:
660 can be fit into 6538 9 times, resulting in a remainder of 598.
Record the quotient 9 as the next digit in the result. 
Result so far: 83659.0
The remainder is 598 after subtracting 5940 from 6538.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5980, and continue the process.

Advancing to step 9:
660 goes into 5980 9 times with a remainder of 40.
Use 9 as the next digit of our solution. 
Result so far: 83659.9
Subtracting 5940 from 5980 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 10:
660 can be fit into 400 0 times, resulting in a remainder of 400.
Record the quotient 0 as the next digit in the result. 
Result so far: 83659.9
If we take 0 away from 400, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Let's proceed to step 11:
When dividing 4000 by 660, we get 6 with a remainder of 40.
The number 6 becomes the next digit in our result. 
Result so far: 83659.906
Subtract 3960 from 4000 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 12:
400 divided by 660 is 0 with a remainder of 400.
Put 0 as the next digit of the answer. 
Result so far: 83659.906
If we take 0 away from 400, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Going ahead to step 13:
4000 divided by 660 is 6 with a remainder of 40.
Write down 6 as next digit of the result. 
Result so far: 83659.90606
Subtracting 3960 from 4000 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 14:
660 can be fit into 400 0 times, resulting in a remainder of 400.
Use 0 as the next digit of our solution. 
Result so far: 83659.90606
Subtracting 0 from 400 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

On to step 15:
If we divide 4000 by 660, we get 6 and a remainder of 40.
Put 6 as the next digit of the answer. 
Result so far: 83659.9060606
If we subtract 3960 from 4000, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 16:
660 can be fit into 400 0 times, resulting in a remainder of 400.
The next digit of our result is 0. 
Result so far: 83659.9060606
If we subtract 0 from 400, we get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final result is 83659.9060606 with a remainder of 4e-07.