We look at the division of 66512389 by 154 
We're looking to find how many times 154 goes into 66512389.

Step 1:
The number 154 fits into 6 0 times, leaving a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 154

Moving on to step 2:
If we divide 66 by 154, we get 0 and a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Grab the next digit (5) from the dividend, add it to 66, then carry on: 665 / 154

On to step 3:
If we divide 665 by 154, we get 4 and a remainder of 49.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 616 from 665 leaves us with 49.
Bring next digit (1) of the dividend behind the 49 and repeat the process: 491 / 154

Moving on to step 4:
154 goes into 491 3 times with a remainder of 29.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
Subtracting 462 from 491 leaves us with 29.
Grab the next digit (2) from the dividend, add it to 29, then carry on: 292 / 154

Let's proceed to step 5:
When dividing 292 by 154, we get 1 with a remainder of 138.
The next digit of our result is 1. 
Result so far: 431.0
Deduct 154 from 292 and we're left with 138.
Include the next digit (3) from the dividend after 138, then repeat: 1383 / 154

On to step 6:
1383 divided by 154 is 8 with a remainder of 151.
The number 8 becomes the next digit in our result. 
Result so far: 4318.0
Subtracting 1232 from 1383 leaves us with 151.
Take the next digit (8) from the dividend and append it to 151, then repeat: 1518 / 154

Step 7:
If we divide 1518 by 154, we get 9 and a remainder of 132.
The next digit of our result is 9. 
Result so far: 43189.0
If we take 1386 away from 1518, we end up with 132.
Take the next digit (9) from the dividend and append it to 132, then repeat: 1329 / 154

Step 8:
154 goes into 1329 8 times with a remainder of 97.
The next digit of our result is 8. 
Result so far: 431898.0
If we subtract 1232 from 1329, 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.

Moving on to step 9:
When dividing 970 by 154, we get 6 with a remainder of 46.
Use 6 as the next digit of our solution. 
Result so far: 431898.6
Subtract 924 from 970 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.

Moving on to step 10:
If we divide 460 by 154, we get 2 and a remainder of 152.
The number 2 becomes the next digit in our result. 
Result so far: 431898.62
Deduct 308 from 460 and we're left with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

On to step 11:
154 can be fit into 1520 9 times, resulting in a remainder of 134.
The next digit of our result is 9. 
Result so far: 431898.629
Subtract 1386 from 1520 to get 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

Going ahead to step 12:
154 can be fit into 1340 8 times, resulting in a remainder of 108.
Use 8 as the next digit of our solution. 
Result so far: 431898.6298
The remainder is 108 after subtracting 1232 from 1340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Advancing to step 13:
154 can be fit into 1080 7 times, resulting in a remainder of 2.
Use 7 as the next digit of our solution. 
Result so far: 431898.62987
The remainder is 2 after subtracting 1078 from 1080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 14:
The number 154 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 431898.62987
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 15:
200 divided by 154 is 1 with a remainder of 46.
Record the quotient 1 as the next digit in the result. 
Result so far: 431898.6298701
The remainder is 46 after subtracting 154 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 16:
When dividing 460 by 154, we get 2 with a remainder of 152.
The number 2 becomes the next digit in our result. 
Result so far: 431898.62987012
Subtracting 308 from 460 leaves us with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Our division results in 431898.62987012 with a remaining 1.52e-07.