66598323 ÷ 155 
We want to figure out the number of times 66598323 can be divided by 155.

Step 1:
The number 155 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 155

Let's proceed to step 2:
155 goes into 66 0 times with a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Fetch the next digit (5) from the dividend, attach it to 66 and continue: 665 / 155

On to step 3:
If we divide 665 by 155, we get 4 and a remainder of 45.
The next digit of our result is 4. 
Result so far: 4.0
If we take 620 away from 665, we end up with 45.
Take the next digit (9) from the dividend and append it to 45, then repeat: 459 / 155

Going ahead to step 4:
155 can be fit into 459 2 times, resulting in a remainder of 149.
Record the quotient 2 as the next digit in the result. 
Result so far: 42.0
Subtracting 310 from 459 leaves us with 149.
Include the next digit (8) from the dividend after 149, then repeat: 1498 / 155

Advancing to step 5:
155 can be fit into 1498 9 times, resulting in a remainder of 103.
Record the quotient 9 as the next digit in the result. 
Result so far: 429.0
Subtracting 1395 from 1498 leaves us with 103.
Include the next digit (3) from the dividend after 103, then repeat: 1033 / 155

On to step 6:
155 goes into 1033 6 times with a remainder of 103.
The number 6 becomes the next digit in our result. 
Result so far: 4296.0
Subtracting 930 from 1033 leaves us with 103.
Append the next digit (2) from the dividend to 103 and continue with: 1032 / 155

Going ahead to step 7:
The number 155 fits into 1032 6 times, leaving a remainder of 102.
Put 6 as the next digit of the answer. 
Result so far: 42966.0
If we take 930 away from 1032, we end up with 102.
Fetch the next digit (3) from the dividend, attach it to 102 and continue: 1023 / 155

Advancing to step 8:
155 goes into 1023 6 times with a remainder of 93.
Write down 6 as next digit of the result. 
Result so far: 429666.0
If we subtract 930 from 1023, we get 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Advancing to step 9:
When dividing 930 by 155, we get 6 with a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 429666.6
Subtract 930 from 930 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
0 divided by 155 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 429666.6
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 11:
155 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 429666.6
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 429666.6 with a remainder of 0.0.