58158398 ÷ 660 
We want to figure out the number of times 58158398 can be divided by 660.

Let's proceed to step 1:
If we divide 5 by 660, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 660

Going ahead to step 2:
The number 660 fits into 58 0 times, leaving a remainder of 58.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 58 and we're left with 58.
Include the next digit (1) from the dividend after 58, then repeat: 581 / 660

Advancing to step 3:
581 divided by 660 is 0 with a remainder of 581.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 581, we end up with 581.
Bring next digit (5) of the dividend behind the 581 and repeat the process: 5815 / 660

Going ahead to step 4:
When dividing 5815 by 660, we get 8 with a remainder of 535.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
The remainder is 535 after subtracting 5280 from 5815.
Bring next digit (8) of the dividend behind the 535 and repeat the process: 5358 / 660

Let's proceed to step 5:
5358 divided by 660 is 8 with a remainder of 78.
The next digit of our result is 8. 
Result so far: 88.0
Subtract 5280 from 5358 to get 78.
Bring next digit (3) of the dividend behind the 78 and repeat the process: 783 / 660

Advancing to step 6:
660 can be fit into 783 1 times, resulting in a remainder of 123.
Use 1 as the next digit of our solution. 
Result so far: 881.0
The remainder is 123 after subtracting 660 from 783.
Bring next digit (9) of the dividend behind the 123 and repeat the process: 1239 / 660

Going ahead to step 7:
1239 divided by 660 is 1 with a remainder of 579.
Put 1 as the next digit of the answer. 
Result so far: 8811.0
Deduct 660 from 1239 and we're left with 579.
Grab the next digit (8) from the dividend, add it to 579, then carry on: 5798 / 660

Moving on to step 8:
If we divide 5798 by 660, we get 8 and a remainder of 518.
The number 8 becomes the next digit in our result. 
Result so far: 88118.0
Subtracting 5280 from 5798 leaves us with 518.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5180, and continue the process.

Moving on to step 9:
660 goes into 5180 7 times with a remainder of 560.
Record the quotient 7 as the next digit in the result. 
Result so far: 88118.7
Deduct 4620 from 5180 and we're left with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Moving on to step 10:
660 can be fit into 5600 8 times, resulting in a remainder of 320.
Use 8 as the next digit of our solution. 
Result so far: 88118.78
Deduct 5280 from 5600 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 11:
The number 660 fits into 3200 4 times, leaving a remainder of 560.
The number 4 becomes the next digit in our result. 
Result so far: 88118.784
If we take 2640 away from 3200, we end up with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

On to step 12:
If we divide 5600 by 660, we get 8 and a remainder of 320.
Record the quotient 8 as the next digit in the result. 
Result so far: 88118.7848
The remainder is 320 after subtracting 5280 from 5600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 13:
The number 660 fits into 3200 4 times, leaving a remainder of 560.
Put 4 as the next digit of the answer. 
Result so far: 88118.78484
Subtract 2640 from 3200 to get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Let's proceed to step 14:
When dividing 5600 by 660, we get 8 with a remainder of 320.
The number 8 becomes the next digit in our result. 
Result so far: 88118.784848
Subtracting 5280 from 5600 leaves us with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Moving on to step 15:
660 can be fit into 3200 4 times, resulting in a remainder of 560.
Put 4 as the next digit of the answer. 
Result so far: 88118.7848484
If we subtract 2640 from 3200, we get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Step 16:
The number 660 fits into 5600 8 times, leaving a remainder of 320.
Use 8 as the next digit of our solution. 
Result so far: 88118.78484848
Deduct 5280 from 5600 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

The final result is 88118.78484848 with a remainder of 3.2e-07.