78987647 divided by 581 
Let's see how many times 581 fits into 78987647.

On to step 1:
7 divided by 581 is 0 with 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.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 581

On to step 2:
When dividing 78 by 581, we get 0 with a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Grab the next digit (9) from the dividend, add it to 78, then carry on: 789 / 581

Moving on to step 3:
When dividing 789 by 581, we get 1 with a remainder of 208.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 581 from 789 to get 208.
Take the next digit (8) from the dividend and append it to 208, then repeat: 2088 / 581

Let's proceed to step 4:
581 can be fit into 2088 3 times, resulting in a remainder of 345.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtracting 1743 from 2088 leaves us with 345.
Fetch the next digit (7) from the dividend, attach it to 345 and continue: 3457 / 581

Moving on to step 5:
3457 divided by 581 is 5 with a remainder of 552.
The next digit of our result is 5. 
Result so far: 135.0
If we take 2905 away from 3457, we end up with 552.
Append the next digit (6) from the dividend to 552 and continue with: 5526 / 581

Step 6:
581 goes into 5526 9 times with a remainder of 297.
The number 9 becomes the next digit in our result. 
Result so far: 1359.0
If we take 5229 away from 5526, we end up with 297.
Append the next digit (4) from the dividend to 297 and continue with: 2974 / 581

Going ahead to step 7:
581 can be fit into 2974 5 times, resulting in a remainder of 69.
Write down 5 as next digit of the result. 
Result so far: 13595.0
If we take 2905 away from 2974, we end up with 69.
Grab the next digit (7) from the dividend, add it to 69, then carry on: 697 / 581

Let's proceed to step 8:
The number 581 fits into 697 1 times, leaving a remainder of 116.
Write down 1 as next digit of the result. 
Result so far: 135951.0
Deduct 581 from 697 and we're left 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.

Advancing to step 9:
581 goes into 1160 1 times with a remainder of 579.
Write down 1 as next digit of the result. 
Result so far: 135951.1
The remainder is 579 after subtracting 581 from 1160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5790, and continue the process.

Moving on to step 10:
581 goes into 5790 9 times with a remainder of 561.
Put 9 as the next digit of the answer. 
Result so far: 135951.19
If we take 5229 away from 5790, we end up with 561.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5610, and continue the process.

Going ahead to step 11:
581 can be fit into 5610 9 times, resulting in a remainder of 381.
Write down 9 as next digit of the result. 
Result so far: 135951.199
If we subtract 5229 from 5610, we get 381.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3810, and continue the process.

After the division, we end up with 135951.199 and a remainder of 0.0381.