78781880 ÷ 644 
Let's see how many times 644 fits into 78781880.

Let's proceed to step 1:
The number 644 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 644

Advancing to step 2:
If we divide 78 by 644, we get 0 and a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Append the next digit (7) from the dividend to 78 and continue with: 787 / 644

Let's proceed to step 3:
644 can be fit into 787 1 times, resulting in a remainder of 143.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 143 after subtracting 644 from 787.
Fetch the next digit (8) from the dividend, attach it to 143 and continue: 1438 / 644

Let's proceed to step 4:
644 can be fit into 1438 2 times, resulting in a remainder of 150.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
The remainder is 150 after subtracting 1288 from 1438.
Include the next digit (1) from the dividend after 150, then repeat: 1501 / 644

Advancing to step 5:
The number 644 fits into 1501 2 times, leaving a remainder of 213.
Record the quotient 2 as the next digit in the result. 
Result so far: 122.0
Subtract 1288 from 1501 to get 213.
Fetch the next digit (8) from the dividend, attach it to 213 and continue: 2138 / 644

Moving on to step 6:
When dividing 2138 by 644, we get 3 with a remainder of 206.
The number 3 becomes the next digit in our result. 
Result so far: 1223.0
The remainder is 206 after subtracting 1932 from 2138.
Include the next digit (8) from the dividend after 206, then repeat: 2068 / 644

Step 7:
2068 divided by 644 is 3 with a remainder of 136.
The number 3 becomes the next digit in our result. 
Result so far: 12233.0
Subtract 1932 from 2068 to get 136.
Grab the next digit (0) from the dividend, add it to 136, then carry on: 1360 / 644

On to step 8:
The number 644 fits into 1360 2 times, leaving a remainder of 72.
Write down 2 as next digit of the result. 
Result so far: 122332.0
If we take 1288 away from 1360, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 9:
644 can be fit into 720 1 times, resulting in a remainder of 76.
The next digit of our result is 1. 
Result so far: 122332.1
Subtract 644 from 720 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 10:
The number 644 fits into 760 1 times, leaving a remainder of 116.
Put 1 as the next digit of the answer. 
Result so far: 122332.11
If we take 644 away from 760, we end up with 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

In conclusion, the division gives 122332.11 with a balance of 0.116.