Let's divide 31510894 by 810
We want to figure out the number of times 31510894 can be divided by 810.

On to step 1:
810 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 810

Advancing to step 2:
When dividing 31 by 810, we get 0 with a remainder of 31.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 31 leaves us with 31.
Grab the next digit (5) from the dividend, add it to 31, then carry on: 315 / 810

Moving on to step 3:
810 can be fit into 315 0 times, resulting in a remainder of 315.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 315 and we're left with 315.
Append the next digit (1) from the dividend to 315 and continue with: 3151 / 810

Let's proceed to step 4:
810 goes into 3151 3 times with a remainder of 721.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 2430 from 3151 and we're left with 721.
Include the next digit (0) from the dividend after 721, then repeat: 7210 / 810

Step 5:
810 can be fit into 7210 8 times, resulting in a remainder of 730.
Write down 8 as next digit of the result. 
Result so far: 38.0
If we take 6480 away from 7210, we end up with 730.
Bring next digit (8) of the dividend behind the 730 and repeat the process: 7308 / 810

Moving on to step 6:
If we divide 7308 by 810, we get 9 and a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 389.0
If we take 7290 away from 7308, we end up with 18.
Include the next digit (9) from the dividend after 18, then repeat: 189 / 810

Let's proceed to step 7:
The number 810 fits into 189 0 times, leaving a remainder of 189.
Write down 0 as next digit of the result. 
Result so far: 3890.0
If we take 0 away from 189, we end up with 189.
Grab the next digit (4) from the dividend, add it to 189, then carry on: 1894 / 810

Going ahead to step 8:
If we divide 1894 by 810, we get 2 and a remainder of 274.
The next digit of our result is 2. 
Result so far: 38902.0
Subtract 1620 from 1894 to get 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Step 9:
2740 divided by 810 is 3 with a remainder of 310.
The next digit of our result is 3. 
Result so far: 38902.3
The remainder is 310 after subtracting 2430 from 2740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Step 10:
810 goes into 3100 3 times with a remainder of 670.
The number 3 becomes the next digit in our result. 
Result so far: 38902.33
Subtract 2430 from 3100 to get 670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6700, and continue the process.

The quotient of the division is 38902.33, and the remainder is 0.67.