We look at the division of 99964580 by 401 
We're looking to find how many times 401 goes into 99964580.

Moving on to step 1:
The number 401 fits into 9 0 times, leaving a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 401

Going ahead to step 2:
When dividing 99 by 401, we get 0 with a remainder of 99.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 99 after subtracting 0 from 99.
Bring next digit (9) of the dividend behind the 99 and repeat the process: 999 / 401

Let's proceed to step 3:
If we divide 999 by 401, we get 2 and a remainder of 197.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 802 from 999 to get 197.
Bring next digit (6) of the dividend behind the 197 and repeat the process: 1976 / 401

Moving on to step 4:
401 goes into 1976 4 times with a remainder of 372.
The next digit of our result is 4. 
Result so far: 24.0
Subtracting 1604 from 1976 leaves us with 372.
Grab the next digit (4) from the dividend, add it to 372, then carry on: 3724 / 401

Advancing to step 5:
When dividing 3724 by 401, we get 9 with a remainder of 115.
Use 9 as the next digit of our solution. 
Result so far: 249.0
If we take 3609 away from 3724, we end up with 115.
Include the next digit (5) from the dividend after 115, then repeat: 1155 / 401

Going ahead to step 6:
401 goes into 1155 2 times with a remainder of 353.
Use 2 as the next digit of our solution. 
Result so far: 2492.0
Subtracting 802 from 1155 leaves us with 353.
Append the next digit (8) from the dividend to 353 and continue with: 3538 / 401

Let's proceed to step 7:
If we divide 3538 by 401, we get 8 and a remainder of 330.
The next digit of our result is 8. 
Result so far: 24928.0
If we subtract 3208 from 3538, we get 330.
Append the next digit (0) from the dividend to 330 and continue with: 3300 / 401

Moving on to step 8:
3300 divided by 401 is 8 with a remainder of 92.
Record the quotient 8 as the next digit in the result. 
Result so far: 249288.0
If we subtract 3208 from 3300, we get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Step 9:
920 divided by 401 is 2 with a remainder of 118.
Use 2 as the next digit of our solution. 
Result so far: 249288.2
Subtract 802 from 920 to get 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Advancing to step 10:
401 goes into 1180 2 times with a remainder of 378.
The number 2 becomes the next digit in our result. 
Result so far: 249288.22
Subtracting 802 from 1180 leaves us with 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

The quotient of the division is 249288.22, and the remainder is 0.378.