We look at the division of 43578789 by 280 
We're looking to find how many times 280 goes into 43578789.

Step 1:
If we divide 4 by 280, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 280

Let's proceed to step 2:
When dividing 43 by 280, we get 0 with a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 43 leaves us with 43.
Bring next digit (5) of the dividend behind the 43 and repeat the process: 435 / 280

Step 3:
280 can be fit into 435 1 times, resulting in a remainder of 155.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 280 from 435, we get 155.
Bring next digit (7) of the dividend behind the 155 and repeat the process: 1557 / 280

Let's proceed to step 4:
The number 280 fits into 1557 5 times, leaving a remainder of 157.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Subtracting 1400 from 1557 leaves us with 157.
Bring next digit (8) of the dividend behind the 157 and repeat the process: 1578 / 280

On to step 5:
280 goes into 1578 5 times with a remainder of 178.
The number 5 becomes the next digit in our result. 
Result so far: 155.0
The remainder is 178 after subtracting 1400 from 1578.
Take the next digit (7) from the dividend and append it to 178, then repeat: 1787 / 280

Advancing to step 6:
280 can be fit into 1787 6 times, resulting in a remainder of 107.
The next digit of our result is 6. 
Result so far: 1556.0
Subtract 1680 from 1787 to get 107.
Append the next digit (8) from the dividend to 107 and continue with: 1078 / 280

Advancing to step 7:
280 goes into 1078 3 times with a remainder of 238.
The number 3 becomes the next digit in our result. 
Result so far: 15563.0
Subtract 840 from 1078 to get 238.
Bring next digit (9) of the dividend behind the 238 and repeat the process: 2389 / 280

On to step 8:
If we divide 2389 by 280, we get 8 and a remainder of 149.
The number 8 becomes the next digit in our result. 
Result so far: 155638.0
Subtracting 2240 from 2389 leaves us with 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

Advancing to step 9:
280 goes into 1490 5 times with a remainder of 90.
The next digit of our result is 5. 
Result so far: 155638.5
If we take 1400 away from 1490, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

On to step 10:
If we divide 900 by 280, we get 3 and a remainder of 60.
The next digit of our result is 3. 
Result so far: 155638.53
If we subtract 840 from 900, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 11:
280 goes into 600 2 times with a remainder of 40.
Record the quotient 2 as the next digit in the result. 
Result so far: 155638.532
Deduct 560 from 600 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.

Moving on to step 12:
The number 280 fits into 400 1 times, leaving a remainder of 120.
The next digit of our result is 1. 
Result so far: 155638.5321
If we subtract 280 from 400, we 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.

Step 13:
280 can be fit into 1200 4 times, resulting in a remainder of 80.
Record the quotient 4 as the next digit in the result. 
Result so far: 155638.53214
If we subtract 1120 from 1200, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 14:
280 goes into 800 2 times with a remainder of 240.
Write down 2 as next digit of the result. 
Result so far: 155638.532142
Subtracting 560 from 800 leaves us with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

On to step 15:
The number 280 fits into 2400 8 times, leaving a remainder of 160.
The next digit of our result is 8. 
Result so far: 155638.5321428
If we subtract 2240 from 2400, we 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.

Advancing to step 16:
If we divide 1600 by 280, we get 5 and a remainder of 200.
Write down 5 as next digit of the result. 
Result so far: 155638.53214285
The remainder is 200 after subtracting 1400 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

After the division, we end up with 155638.53214285 and a remainder of 2e-07.