213870 ÷ 8 
We're looking to find how many times 8 goes into 213870.

Step 1:
If we divide 2 by 8, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 8

Advancing to step 2:
If we divide 21 by 8, we get 2 and a remainder of 5.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 16 from 21, we get 5.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 8

On to step 3:
53 divided by 8 is 6 with a remainder of 5.
Use 6 as the next digit of our solution. 
Result so far: 26.0
Deduct 48 from 53 and we're left with 5.
Grab the next digit (8) from the dividend, add it to 5, then carry on: 58 / 8

On to step 4:
8 can be fit into 58 7 times, resulting in a remainder of 2.
Use 7 as the next digit of our solution. 
Result so far: 267.0
If we take 56 away from 58, we end up with 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 8

Moving on to step 5:
If we divide 27 by 8, we get 3 and a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 2673.0
The remainder is 3 after subtracting 24 from 27.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 8

Going ahead to step 6:
8 can be fit into 30 3 times, resulting in a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 26733.0
Subtract 24 from 30 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 7:
8 can be fit into 60 7 times, resulting in a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 26733.7
Deduct 56 from 60 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 8:
When dividing 40 by 8, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 26733.75
Deduct 40 from 40 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.

Step 9:
If we divide 0 by 8, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 26733.75
Subtracting 0 from 0 leaves us 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.

On to step 10:
0 divided by 8 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 26733.75
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 final outcome is 26733.75, with a leftover of 0.0.