64889120 ÷ 86 
We want to figure out the number of times 64889120 can be divided by 86.

Let's proceed to step 1:
86 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 86

Let's proceed to step 2:
86 goes into 64 0 times with a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Take the next digit (8) from the dividend and append it to 64, then repeat: 648 / 86

Moving on to step 3:
When dividing 648 by 86, we get 7 with a remainder of 46.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtract 602 from 648 to get 46.
Grab the next digit (8) from the dividend, add it to 46, then carry on: 468 / 86

Step 4:
86 goes into 468 5 times with a remainder of 38.
The next digit of our result is 5. 
Result so far: 75.0
If we subtract 430 from 468, we get 38.
Grab the next digit (9) from the dividend, add it to 38, then carry on: 389 / 86

Going ahead to step 5:
When dividing 389 by 86, we get 4 with a remainder of 45.
Put 4 as the next digit of the answer. 
Result so far: 754.0
Deduct 344 from 389 and we're left with 45.
Append the next digit (1) from the dividend to 45 and continue with: 451 / 86

Moving on to step 6:
451 divided by 86 is 5 with a remainder of 21.
Write down 5 as next digit of the result. 
Result so far: 7545.0
Subtracting 430 from 451 leaves us with 21.
Fetch the next digit (2) from the dividend, attach it to 21 and continue: 212 / 86

On to step 7:
86 goes into 212 2 times with a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 75452.0
Deduct 172 from 212 and we're left with 40.
Bring next digit (0) of the dividend behind the 40 and repeat the process: 400 / 86

Moving on to step 8:
400 divided by 86 is 4 with a remainder of 56.
Record the quotient 4 as the next digit in the result. 
Result so far: 754524.0
Subtract 344 from 400 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 9:
86 can be fit into 560 6 times, resulting in a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 754524.6
Deduct 516 from 560 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Moving on to step 10:
440 divided by 86 is 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 754524.65
If we subtract 430 from 440, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 11:
The number 86 fits into 100 1 times, leaving a remainder of 14.
The next digit of our result is 1. 
Result so far: 754524.651
Subtracting 86 from 100 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 12:
The number 86 fits into 140 1 times, leaving a remainder of 54.
Record the quotient 1 as the next digit in the result. 
Result so far: 754524.6511
Subtract 86 from 140 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Our division results in 754524.6511 with a remaining 0.00054.