We look at the division of 39991609 by 154 
We're looking to find how many times 154 goes into 39991609.

Let's proceed to step 1:
If we divide 3 by 154, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 154

Step 2:
39 divided by 154 is 0 with a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Take the next digit (9) from the dividend and append it to 39, then repeat: 399 / 154

Let's proceed to step 3:
When dividing 399 by 154, we get 2 with a remainder of 91.
The next digit of our result is 2. 
Result so far: 2.0
If we take 308 away from 399, we end up with 91.
Fetch the next digit (9) from the dividend, attach it to 91 and continue: 919 / 154

Advancing to step 4:
If we divide 919 by 154, we get 5 and a remainder of 149.
Put 5 as the next digit of the answer. 
Result so far: 25.0
Subtract 770 from 919 to get 149.
Grab the next digit (1) from the dividend, add it to 149, then carry on: 1491 / 154

Moving on to step 5:
If we divide 1491 by 154, we get 9 and a remainder of 105.
Write down 9 as next digit of the result. 
Result so far: 259.0
Deduct 1386 from 1491 and we're left with 105.
Take the next digit (6) from the dividend and append it to 105, then repeat: 1056 / 154

Going ahead to step 6:
1056 divided by 154 is 6 with a remainder of 132.
The next digit of our result is 6. 
Result so far: 2596.0
If we take 924 away from 1056, we end up with 132.
Take the next digit (0) from the dividend and append it to 132, then repeat: 1320 / 154

Moving on to step 7:
The number 154 fits into 1320 8 times, leaving a remainder of 88.
Use 8 as the next digit of our solution. 
Result so far: 25968.0
Subtracting 1232 from 1320 leaves us with 88.
Take the next digit (9) from the dividend and append it to 88, then repeat: 889 / 154

On to step 8:
If we divide 889 by 154, we get 5 and a remainder of 119.
Put 5 as the next digit of the answer. 
Result so far: 259685.0
Subtracting 770 from 889 leaves us with 119.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Advancing to step 9:
154 can be fit into 1190 7 times, resulting in a remainder of 112.
Put 7 as the next digit of the answer. 
Result so far: 259685.7
Subtracting 1078 from 1190 leaves us with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

On to step 10:
If we divide 1120 by 154, we get 7 and a remainder of 42.
Use 7 as the next digit of our solution. 
Result so far: 259685.77
If we take 1078 away from 1120, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

The quotient of the division is 259685.77, and the remainder is 0.042.