We're dividing 98721953 by 646 
Our goal is to divide 98721953 by 646.

Let's proceed to step 1:
When dividing 9 by 646, we get 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 646

Moving on to step 2:
If we divide 98 by 646, we get 0 and a remainder of 98.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 98 after subtracting 0 from 98.
Include the next digit (7) from the dividend after 98, then repeat: 987 / 646

Going ahead to step 3:
When dividing 987 by 646, we get 1 with a remainder of 341.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 646 from 987 to get 341.
Bring next digit (2) of the dividend behind the 341 and repeat the process: 3412 / 646

Advancing to step 4:
If we divide 3412 by 646, we get 5 and a remainder of 182.
Write down 5 as next digit of the result. 
Result so far: 15.0
The remainder is 182 after subtracting 3230 from 3412.
Append the next digit (1) from the dividend to 182 and continue with: 1821 / 646

On to step 5:
When dividing 1821 by 646, we get 2 with a remainder of 529.
Use 2 as the next digit of our solution. 
Result so far: 152.0
Deduct 1292 from 1821 and we're left with 529.
Bring next digit (9) of the dividend behind the 529 and repeat the process: 5299 / 646

Step 6:
646 can be fit into 5299 8 times, resulting in a remainder of 131.
Record the quotient 8 as the next digit in the result. 
Result so far: 1528.0
Subtracting 5168 from 5299 leaves us with 131.
Bring next digit (5) of the dividend behind the 131 and repeat the process: 1315 / 646

Going ahead to step 7:
The number 646 fits into 1315 2 times, leaving a remainder of 23.
Use 2 as the next digit of our solution. 
Result so far: 15282.0
If we take 1292 away from 1315, we end up with 23.
Take the next digit (3) from the dividend and append it to 23, then repeat: 233 / 646

Going ahead to step 8:
646 goes into 233 0 times with a remainder of 233.
Record the quotient 0 as the next digit in the result. 
Result so far: 152820.0
If we subtract 0 from 233, we get 233.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Moving on to step 9:
When dividing 2330 by 646, we get 3 with a remainder of 392.
Record the quotient 3 as the next digit in the result. 
Result so far: 152820.3
The remainder is 392 after subtracting 1938 from 2330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Going ahead to step 10:
When dividing 3920 by 646, we get 6 with a remainder of 44.
Use 6 as the next digit of our solution. 
Result so far: 152820.36
If we subtract 3876 from 3920, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 11:
440 divided by 646 is 0 with a remainder of 440.
Record the quotient 0 as the next digit in the result. 
Result so far: 152820.36
Deduct 0 from 440 and we're left with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Let's proceed to step 12:
When dividing 4400 by 646, we get 6 with a remainder of 524.
Put 6 as the next digit of the answer. 
Result so far: 152820.3606
If we subtract 3876 from 4400, we get 524.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5240, and continue the process.

Advancing to step 13:
646 goes into 5240 8 times with a remainder of 72.
Use 8 as the next digit of our solution. 
Result so far: 152820.36068
If we take 5168 away from 5240, 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.

Advancing to step 14:
646 goes into 720 1 times with a remainder of 74.
Record the quotient 1 as the next digit in the result. 
Result so far: 152820.360681
Deduct 646 from 720 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 15:
If we divide 740 by 646, we get 1 and a remainder of 94.
Use 1 as the next digit of our solution. 
Result so far: 152820.3606811
Subtracting 646 from 740 leaves us with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

After the division, we end up with 152820.3606811 and a remainder of 9.4e-07.