We're dividing 64690870 by 88 
We're looking to find how many times 88 goes into 64690870.

Step 1:
The number 88 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 88

Advancing to step 2:
64 divided by 88 is 0 with a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Grab the next digit (6) from the dividend, add it to 64, then carry on: 646 / 88

Moving on to step 3:
88 can be fit into 646 7 times, resulting in a remainder of 30.
Use 7 as the next digit of our solution. 
Result so far: 7.0
The remainder is 30 after subtracting 616 from 646.
Bring next digit (9) of the dividend behind the 30 and repeat the process: 309 / 88

Step 4:
If we divide 309 by 88, we get 3 and a remainder of 45.
Write down 3 as next digit of the result. 
Result so far: 73.0
The remainder is 45 after subtracting 264 from 309.
Grab the next digit (0) from the dividend, add it to 45, then carry on: 450 / 88

Step 5:
88 can be fit into 450 5 times, resulting in a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 735.0
If we subtract 440 from 450, we get 10.
Grab the next digit (8) from the dividend, add it to 10, then carry on: 108 / 88

Step 6:
108 divided by 88 is 1 with a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 7351.0
If we take 88 away from 108, we end up with 20.
Include the next digit (7) from the dividend after 20, then repeat: 207 / 88

Advancing to step 7:
88 can be fit into 207 2 times, resulting in a remainder of 31.
Record the quotient 2 as the next digit in the result. 
Result so far: 73512.0
The remainder is 31 after subtracting 176 from 207.
Bring next digit (0) of the dividend behind the 31 and repeat the process: 310 / 88

Let's proceed to step 8:
88 can be fit into 310 3 times, resulting in a remainder of 46.
The number 3 becomes the next digit in our result. 
Result so far: 735123.0
If we subtract 264 from 310, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 9:
460 divided by 88 is 5 with a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 735123.5
If we take 440 away from 460, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 10:
When dividing 200 by 88, we get 2 with a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 735123.52
If we take 176 away from 200, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 11:
88 can be fit into 240 2 times, resulting in a remainder of 64.
Put 2 as the next digit of the answer. 
Result so far: 735123.522
The remainder is 64 after subtracting 176 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The final outcome is 735123.522, with a leftover of 0.0064.