688510 ÷ 3 
We want to figure out the number of times 688510 can be divided by 3.

Advancing to step 1:
When dividing 6 by 3, we get 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 6 from 6 to get 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 3

Advancing to step 2:
If we divide 8 by 3, we get 2 and a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 22.0
Subtracting 6 from 8 leaves us with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 3

Let's proceed to step 3:
When dividing 28 by 3, we get 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 229.0
Subtracting 27 from 28 leaves us with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 3

Going ahead to step 4:
15 divided by 3 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 2295.0
The remainder is 0 after subtracting 15 from 15.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 3

Step 5:
3 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 22950.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 3

Advancing to step 6:
If we divide 10 by 3, we get 3 and a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 229503.0
If we take 9 away from 10, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
3 goes into 10 3 times with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 229503.3
Subtracting 9 from 10 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 8:
3 goes into 10 3 times with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 229503.33
If we take 9 away from 10, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 229503.33, with a leftover of 0.001.