We divide 91405009 by 280
Our goal is to divide 91405009 by 280.

Advancing to step 1:
280 can be fit into 9 0 times, resulting in a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 280

On to step 2:
280 goes into 91 0 times with a remainder of 91.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 91 leaves us with 91.
Include the next digit (4) from the dividend after 91, then repeat: 914 / 280

Step 3:
If we divide 914 by 280, we get 3 and a remainder of 74.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 840 from 914, we get 74.
Bring next digit (0) of the dividend behind the 74 and repeat the process: 740 / 280

Step 4:
280 can be fit into 740 2 times, resulting in a remainder of 180.
The number 2 becomes the next digit in our result. 
Result so far: 32.0
Subtract 560 from 740 to get 180.
Append the next digit (5) from the dividend to 180 and continue with: 1805 / 280

On to step 5:
280 can be fit into 1805 6 times, resulting in a remainder of 125.
The number 6 becomes the next digit in our result. 
Result so far: 326.0
If we subtract 1680 from 1805, we get 125.
Grab the next digit (0) from the dividend, add it to 125, then carry on: 1250 / 280

On to step 6:
If we divide 1250 by 280, we get 4 and a remainder of 130.
Record the quotient 4 as the next digit in the result. 
Result so far: 3264.0
Subtracting 1120 from 1250 leaves us with 130.
Bring next digit (0) of the dividend behind the 130 and repeat the process: 1300 / 280

Advancing to step 7:
When dividing 1300 by 280, we get 4 with a remainder of 180.
The next digit of our result is 4. 
Result so far: 32644.0
The remainder is 180 after subtracting 1120 from 1300.
Include the next digit (9) from the dividend after 180, then repeat: 1809 / 280

Let's proceed to step 8:
280 can be fit into 1809 6 times, resulting in a remainder of 129.
The next digit of our result is 6. 
Result so far: 326446.0
Subtract 1680 from 1809 to get 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

Step 9:
The number 280 fits into 1290 4 times, leaving a remainder of 170.
The next digit of our result is 4. 
Result so far: 326446.4
If we take 1120 away from 1290, we end up with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Step 10:
1700 divided by 280 is 6 with a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 326446.46
If we subtract 1680 from 1700, 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.

On to step 11:
The number 280 fits into 200 0 times, leaving a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 326446.46
If we take 0 away from 200, we end up with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Step 12:
280 can be fit into 2000 7 times, resulting in a remainder of 40.
Put 7 as the next digit of the answer. 
Result so far: 326446.4607
Subtracting 1960 from 2000 leaves us 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 13:
The number 280 fits into 400 1 times, leaving a remainder of 120.
The number 1 becomes the next digit in our result. 
Result so far: 326446.46071
Subtract 280 from 400 to get 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 14:
When dividing 1200 by 280, we get 4 with a remainder of 80.
Put 4 as the next digit of the answer. 
Result so far: 326446.460714
Subtracting 1120 from 1200 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 15:
The number 280 fits into 800 2 times, leaving a remainder of 240.
Use 2 as the next digit of our solution. 
Result so far: 326446.4607142
The remainder is 240 after subtracting 560 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Going ahead to step 16:
If we divide 2400 by 280, we get 8 and a remainder of 160.
Use 8 as the next digit of our solution. 
Result so far: 326446.46071428
Subtract 2240 from 2400 to get 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 326446.46071428 with a balance of 1.6e-07.