We're dividing 71389400 by 816 
We want to figure out the number of times 71389400 can be divided by 816.

Advancing to step 1:
816 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 816

Moving on to step 2:
816 goes into 71 0 times with a remainder of 71.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 71, we end up with 71.
Fetch the next digit (3) from the dividend, attach it to 71 and continue: 713 / 816

Let's proceed to step 3:
When dividing 713 by 816, we get 0 with a remainder of 713.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 713, we end up with 713.
Bring next digit (8) of the dividend behind the 713 and repeat the process: 7138 / 816

Advancing to step 4:
7138 divided by 816 is 8 with a remainder of 610.
Use 8 as the next digit of our solution. 
Result so far: 8.0
The remainder is 610 after subtracting 6528 from 7138.
Fetch the next digit (9) from the dividend, attach it to 610 and continue: 6109 / 816

Moving on to step 5:
816 can be fit into 6109 7 times, resulting in a remainder of 397.
Use 7 as the next digit of our solution. 
Result so far: 87.0
Subtract 5712 from 6109 to get 397.
Take the next digit (4) from the dividend and append it to 397, then repeat: 3974 / 816

On to step 6:
816 goes into 3974 4 times with a remainder of 710.
Write down 4 as next digit of the result. 
Result so far: 874.0
If we subtract 3264 from 3974, we get 710.
Grab the next digit (0) from the dividend, add it to 710, then carry on: 7100 / 816

Step 7:
7100 divided by 816 is 8 with a remainder of 572.
The number 8 becomes the next digit in our result. 
Result so far: 8748.0
If we subtract 6528 from 7100, we get 572.
Grab the next digit (0) from the dividend, add it to 572, then carry on: 5720 / 816

Moving on to step 8:
If we divide 5720 by 816, we get 7 and a remainder of 8.
Put 7 as the next digit of the answer. 
Result so far: 87487.0
The remainder is 8 after subtracting 5712 from 5720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
80 divided by 816 is 0 with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 87487.0
If we subtract 0 from 80, 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.

On to step 10:
816 goes into 800 0 times with a remainder of 800.
The next digit of our result is 0. 
Result so far: 87487.0
The remainder is 800 after subtracting 0 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

The quotient of the division is 87487.0, and the remainder is 0.8.