40128984 ÷ 260 
We're looking to find how many times 260 goes into 40128984.

Moving on to step 1:
260 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 260

Let's proceed to step 2:
If we divide 40 by 260, we get 0 and a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 40 after subtracting 0 from 40.
Fetch the next digit (1) from the dividend, attach it to 40 and continue: 401 / 260

Advancing to step 3:
If we divide 401 by 260, we get 1 and a remainder of 141.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 260 away from 401, we end up with 141.
Grab the next digit (2) from the dividend, add it to 141, then carry on: 1412 / 260

Moving on to step 4:
The number 260 fits into 1412 5 times, leaving a remainder of 112.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Deduct 1300 from 1412 and we're left with 112.
Fetch the next digit (8) from the dividend, attach it to 112 and continue: 1128 / 260

Step 5:
260 goes into 1128 4 times with a remainder of 88.
The next digit of our result is 4. 
Result so far: 154.0
Subtract 1040 from 1128 to get 88.
Bring next digit (9) of the dividend behind the 88 and repeat the process: 889 / 260

Advancing to step 6:
If we divide 889 by 260, we get 3 and a remainder of 109.
The next digit of our result is 3. 
Result so far: 1543.0
Subtracting 780 from 889 leaves us with 109.
Take the next digit (8) from the dividend and append it to 109, then repeat: 1098 / 260

Moving on to step 7:
When dividing 1098 by 260, we get 4 with a remainder of 58.
Write down 4 as next digit of the result. 
Result so far: 15434.0
Deduct 1040 from 1098 and we're left with 58.
Include the next digit (4) from the dividend after 58, then repeat: 584 / 260

Let's proceed to step 8:
The number 260 fits into 584 2 times, leaving a remainder of 64.
The number 2 becomes the next digit in our result. 
Result so far: 154342.0
If we take 520 away from 584, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 9:
640 divided by 260 is 2 with a remainder of 120.
Put 2 as the next digit of the answer. 
Result so far: 154342.2
If we take 520 away from 640, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 10:
260 can be fit into 1200 4 times, resulting in a remainder of 160.
The number 4 becomes the next digit in our result. 
Result so far: 154342.24
Subtracting 1040 from 1200 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 11:
260 goes into 1600 6 times with a remainder of 40.
The number 6 becomes the next digit in our result. 
Result so far: 154342.246
Deduct 1560 from 1600 and we're left 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 12:
400 divided by 260 is 1 with a remainder of 140.
The number 1 becomes the next digit in our result. 
Result so far: 154342.2461
The remainder is 140 after subtracting 260 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Advancing to step 13:
The number 260 fits into 1400 5 times, leaving a remainder of 100.
Write down 5 as next digit of the result. 
Result so far: 154342.24615
If we take 1300 away from 1400, we end up with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 14:
When dividing 1000 by 260, we get 3 with a remainder of 220.
Record the quotient 3 as the next digit in the result. 
Result so far: 154342.246153
If we subtract 780 from 1000, we get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Going ahead to step 15:
260 goes into 2200 8 times with a remainder of 120.
Record the quotient 8 as the next digit in the result. 
Result so far: 154342.2461538
If we take 2080 away from 2200, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 16:
The number 260 fits into 1200 4 times, leaving a remainder of 160.
Put 4 as the next digit of the answer. 
Result so far: 154342.24615384
Subtracting 1040 from 1200 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

In conclusion, the division gives 154342.24615384 with a balance of 1.6e-07.