902543 ÷ 80 
Let's see how many times 80 fits into 902543.

Advancing to step 1:
If we divide 9 by 80, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 80

Advancing to step 2:
The number 80 fits into 90 1 times, leaving a remainder of 10.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 80 from 90 to get 10.
Grab the next digit (2) from the dividend, add it to 10, then carry on: 102 / 80

Step 3:
If we divide 102 by 80, we get 1 and a remainder of 22.
Put 1 as the next digit of the answer. 
Result so far: 11.0
If we take 80 away from 102, we end up with 22.
Bring next digit (5) of the dividend behind the 22 and repeat the process: 225 / 80

On to step 4:
The number 80 fits into 225 2 times, leaving a remainder of 65.
The number 2 becomes the next digit in our result. 
Result so far: 112.0
Subtract 160 from 225 to get 65.
Include the next digit (4) from the dividend after 65, then repeat: 654 / 80

Step 5:
654 divided by 80 is 8 with a remainder of 14.
The number 8 becomes the next digit in our result. 
Result so far: 1128.0
If we subtract 640 from 654, we get 14.
Bring next digit (3) of the dividend behind the 14 and repeat the process: 143 / 80

Step 6:
80 goes into 143 1 times with a remainder of 63.
The next digit of our result is 1. 
Result so far: 11281.0
If we take 80 away from 143, we end up with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Step 7:
630 divided by 80 is 7 with a remainder of 70.
The next digit of our result is 7. 
Result so far: 11281.7
Subtracting 560 from 630 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 8:
700 divided by 80 is 8 with a remainder of 60.
The next digit of our result is 8. 
Result so far: 11281.78
The remainder is 60 after subtracting 640 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
When dividing 600 by 80, we get 7 with a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 11281.787
Subtracting 560 from 600 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.

On to step 10:
When dividing 400 by 80, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 11281.7875
Deduct 400 from 400 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 11281.7875
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 12:
80 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 11281.7875
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 11281.7875, and the remainder is 0.0.