Let's divide 98686580 by 646
We want to figure out the number of times 98686580 can be divided by 646.

Moving on to step 1:
When dividing 9 by 646, we get 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 646

Going ahead to step 2:
98 divided by 646 is 0 with a remainder of 98.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 98, we end up with 98.
Include the next digit (6) from the dividend after 98, then repeat: 986 / 646

On to step 3:
986 divided by 646 is 1 with a remainder of 340.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 646 from 986 leaves us with 340.
Grab the next digit (8) from the dividend, add it to 340, then carry on: 3408 / 646

On to step 4:
The number 646 fits into 3408 5 times, leaving a remainder of 178.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
If we take 3230 away from 3408, we end up with 178.
Include the next digit (6) from the dividend after 178, then repeat: 1786 / 646

On to step 5:
The number 646 fits into 1786 2 times, leaving a remainder of 494.
The next digit of our result is 2. 
Result so far: 152.0
Subtract 1292 from 1786 to get 494.
Fetch the next digit (5) from the dividend, attach it to 494 and continue: 4945 / 646

Advancing to step 6:
646 can be fit into 4945 7 times, resulting in a remainder of 423.
The next digit of our result is 7. 
Result so far: 1527.0
Subtract 4522 from 4945 to get 423.
Bring next digit (8) of the dividend behind the 423 and repeat the process: 4238 / 646

Advancing to step 7:
The number 646 fits into 4238 6 times, leaving a remainder of 362.
The number 6 becomes the next digit in our result. 
Result so far: 15276.0
If we subtract 3876 from 4238, we get 362.
Take the next digit (0) from the dividend and append it to 362, then repeat: 3620 / 646

Let's proceed to step 8:
646 goes into 3620 5 times with a remainder of 390.
The next digit of our result is 5. 
Result so far: 152765.0
Deduct 3230 from 3620 and we're left with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Advancing to step 9:
The number 646 fits into 3900 6 times, leaving a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 152765.6
Deduct 3876 from 3900 and we're left 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.

Let's proceed to step 10:
646 goes into 240 0 times with a remainder of 240.
Put 0 as the next digit of the answer. 
Result so far: 152765.6
If we subtract 0 from 240, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Going ahead to step 11:
The number 646 fits into 2400 3 times, leaving a remainder of 462.
Write down 3 as next digit of the result. 
Result so far: 152765.603
If we take 1938 away from 2400, we end up with 462.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4620, and continue the process.

Let's proceed to step 12:
4620 divided by 646 is 7 with a remainder of 98.
Use 7 as the next digit of our solution. 
Result so far: 152765.6037
If we subtract 4522 from 4620, we get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Advancing to step 13:
The number 646 fits into 980 1 times, leaving a remainder of 334.
The number 1 becomes the next digit in our result. 
Result so far: 152765.60371
The remainder is 334 after subtracting 646 from 980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3340, and continue the process.

Going ahead to step 14:
If we divide 3340 by 646, we get 5 and a remainder of 110.
The number 5 becomes the next digit in our result. 
Result so far: 152765.603715
If we take 3230 away from 3340, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Going ahead to step 15:
When dividing 1100 by 646, we get 1 with a remainder of 454.
Use 1 as the next digit of our solution. 
Result so far: 152765.6037151
If we take 646 away from 1100, we end up with 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

Step 16:
4540 divided by 646 is 7 with a remainder of 18.
Put 7 as the next digit of the answer. 
Result so far: 152765.60371517
If we take 4522 away from 4540, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

The final outcome is 152765.60371517, with a leftover of 1.8e-08.