We look at the division of 83400054 by 688 
Let's see how many times 688 fits into 83400054.

Advancing to step 1:
The number 688 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 688

On to step 2:
The number 688 fits into 83 0 times, leaving a remainder of 83.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 83 and we're left with 83.
Include the next digit (4) from the dividend after 83, then repeat: 834 / 688

On to step 3:
When dividing 834 by 688, we get 1 with a remainder of 146.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 688 from 834 leaves us with 146.
Bring next digit (0) of the dividend behind the 146 and repeat the process: 1460 / 688

Advancing to step 4:
If we divide 1460 by 688, we get 2 and a remainder of 84.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtracting 1376 from 1460 leaves us with 84.
Bring next digit (0) of the dividend behind the 84 and repeat the process: 840 / 688

Let's proceed to step 5:
688 can be fit into 840 1 times, resulting in a remainder of 152.
Use 1 as the next digit of our solution. 
Result so far: 121.0
Subtracting 688 from 840 leaves us with 152.
Include the next digit (0) from the dividend after 152, then repeat: 1520 / 688

Let's proceed to step 6:
The number 688 fits into 1520 2 times, leaving a remainder of 144.
Use 2 as the next digit of our solution. 
Result so far: 1212.0
Subtract 1376 from 1520 to get 144.
Fetch the next digit (5) from the dividend, attach it to 144 and continue: 1445 / 688

Advancing to step 7:
If we divide 1445 by 688, we get 2 and a remainder of 69.
Put 2 as the next digit of the answer. 
Result so far: 12122.0
If we subtract 1376 from 1445, we get 69.
Take the next digit (4) from the dividend and append it to 69, then repeat: 694 / 688

Let's proceed to step 8:
694 divided by 688 is 1 with a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 121221.0
If we subtract 688 from 694, we 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 9:
The number 688 fits into 60 0 times, leaving a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 121221.0
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 10:
688 can be fit into 600 0 times, resulting in a remainder of 600.
Use 0 as the next digit of our solution. 
Result so far: 121221.0
If we take 0 away from 600, we end up with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

In conclusion, the division gives 121221.0 with a balance of 0.6.