9212356 ÷ 870 
We're looking to find how many times 870 goes into 9212356.

Moving on to step 1:
When dividing 9 by 870, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Grab the next digit (2) from the dividend, add it to 9, then carry on: 92 / 870

Step 2:
If we divide 92 by 870, we get 0 and a remainder of 92.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 92, we end up with 92.
Fetch the next digit (1) from the dividend, attach it to 92 and continue: 921 / 870

Going ahead to step 3:
The number 870 fits into 921 1 times, leaving a remainder of 51.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 870 from 921 to get 51.
Include the next digit (2) from the dividend after 51, then repeat: 512 / 870

On to step 4:
870 can be fit into 512 0 times, resulting in a remainder of 512.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtracting 0 from 512 leaves us with 512.
Include the next digit (3) from the dividend after 512, then repeat: 5123 / 870

Let's proceed to step 5:
870 can be fit into 5123 5 times, resulting in a remainder of 773.
Write down 5 as next digit of the result. 
Result so far: 105.0
If we take 4350 away from 5123, we end up with 773.
Bring next digit (5) of the dividend behind the 773 and repeat the process: 7735 / 870

Let's proceed to step 6:
870 goes into 7735 8 times with a remainder of 775.
Put 8 as the next digit of the answer. 
Result so far: 1058.0
Deduct 6960 from 7735 and we're left with 775.
Fetch the next digit (6) from the dividend, attach it to 775 and continue: 7756 / 870

Advancing to step 7:
If we divide 7756 by 870, we get 8 and a remainder of 796.
Put 8 as the next digit of the answer. 
Result so far: 10588.0
If we subtract 6960 from 7756, we get 796.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7960, and continue the process.

Let's proceed to step 8:
870 can be fit into 7960 9 times, resulting in a remainder of 130.
The next digit of our result is 9. 
Result so far: 10588.9
If we subtract 7830 from 7960, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Step 9:
870 goes into 1300 1 times with a remainder of 430.
Write down 1 as next digit of the result. 
Result so far: 10588.91
Subtract 870 from 1300 to get 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

On to step 10:
870 can be fit into 4300 4 times, resulting in a remainder of 820.
The number 4 becomes the next digit in our result. 
Result so far: 10588.914
If we subtract 3480 from 4300, we get 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8200, and continue the process.

Advancing to step 11:
870 can be fit into 8200 9 times, resulting in a remainder of 370.
The next digit of our result is 9. 
Result so far: 10588.9149
If we subtract 7830 from 8200, we get 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Let's proceed to step 12:
When dividing 3700 by 870, we get 4 with a remainder of 220.
Put 4 as the next digit of the answer. 
Result so far: 10588.91494
Deduct 3480 from 3700 and we're left with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Step 13:
2200 divided by 870 is 2 with a remainder of 460.
Record the quotient 2 as the next digit in the result. 
Result so far: 10588.914942
Subtract 1740 from 2200 to get 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

On to step 14:
870 goes into 4600 5 times with a remainder of 250.
Use 5 as the next digit of our solution. 
Result so far: 10588.9149425
If we take 4350 away from 4600, we end up with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Moving on to step 15:
870 can be fit into 2500 2 times, resulting in a remainder of 760.
Record the quotient 2 as the next digit in the result. 
Result so far: 10588.91494252
If we take 1740 away from 2500, we end up with 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7600, and continue the process.

The final result is 10588.91494252 with a remainder of 7.6e-07.