87123925 ÷ 811 
Let's see how many times 811 fits into 87123925.

Let's proceed to step 1:
8 divided by 811 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 811

Going ahead to step 2:
811 can be fit into 87 0 times, resulting in a remainder of 87.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 87 to get 87.
Include the next digit (1) from the dividend after 87, then repeat: 871 / 811

Let's proceed to step 3:
The number 811 fits into 871 1 times, leaving a remainder of 60.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 811 from 871 and we're left with 60.
Grab the next digit (2) from the dividend, add it to 60, then carry on: 602 / 811

Let's proceed to step 4:
When dividing 602 by 811, we get 0 with a remainder of 602.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtracting 0 from 602 leaves us with 602.
Bring next digit (3) of the dividend behind the 602 and repeat the process: 6023 / 811

Advancing to step 5:
811 goes into 6023 7 times with a remainder of 346.
Write down 7 as next digit of the result. 
Result so far: 107.0
Deduct 5677 from 6023 and we're left with 346.
Fetch the next digit (9) from the dividend, attach it to 346 and continue: 3469 / 811

Going ahead to step 6:
The number 811 fits into 3469 4 times, leaving a remainder of 225.
Put 4 as the next digit of the answer. 
Result so far: 1074.0
The remainder is 225 after subtracting 3244 from 3469.
Include the next digit (2) from the dividend after 225, then repeat: 2252 / 811

Advancing to step 7:
When dividing 2252 by 811, we get 2 with a remainder of 630.
Write down 2 as next digit of the result. 
Result so far: 10742.0
Subtracting 1622 from 2252 leaves us with 630.
Take the next digit (5) from the dividend and append it to 630, then repeat: 6305 / 811

Step 8:
If we divide 6305 by 811, we get 7 and a remainder of 628.
Write down 7 as next digit of the result. 
Result so far: 107427.0
The remainder is 628 after subtracting 5677 from 6305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6280, and continue the process.

Advancing to step 9:
When dividing 6280 by 811, we get 7 with a remainder of 603.
Use 7 as the next digit of our solution. 
Result so far: 107427.7
The remainder is 603 after subtracting 5677 from 6280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6030, and continue the process.

Let's proceed to step 10:
811 can be fit into 6030 7 times, resulting in a remainder of 353.
Put 7 as the next digit of the answer. 
Result so far: 107427.77
Deduct 5677 from 6030 and we're left with 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

The final outcome is 107427.77, with a leftover of 0.353.