We divide 66921638 by 401
We're looking to find how many times 401 goes into 66921638.

Step 1:
If we divide 6 by 401, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 401

Advancing to step 2:
If we divide 66 by 401, we get 0 and a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Grab the next digit (9) from the dividend, add it to 66, then carry on: 669 / 401

Step 3:
669 divided by 401 is 1 with a remainder of 268.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 401 away from 669, we end up with 268.
Append the next digit (2) from the dividend to 268 and continue with: 2682 / 401

Step 4:
When dividing 2682 by 401, we get 6 with a remainder of 276.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
Subtracting 2406 from 2682 leaves us with 276.
Fetch the next digit (1) from the dividend, attach it to 276 and continue: 2761 / 401

Moving on to step 5:
The number 401 fits into 2761 6 times, leaving a remainder of 355.
Write down 6 as next digit of the result. 
Result so far: 166.0
Subtracting 2406 from 2761 leaves us with 355.
Take the next digit (6) from the dividend and append it to 355, then repeat: 3556 / 401

Moving on to step 6:
When dividing 3556 by 401, we get 8 with a remainder of 348.
Record the quotient 8 as the next digit in the result. 
Result so far: 1668.0
Subtracting 3208 from 3556 leaves us with 348.
Append the next digit (3) from the dividend to 348 and continue with: 3483 / 401

Step 7:
If we divide 3483 by 401, we get 8 and a remainder of 275.
Put 8 as the next digit of the answer. 
Result so far: 16688.0
If we subtract 3208 from 3483, we get 275.
Take the next digit (8) from the dividend and append it to 275, then repeat: 2758 / 401

Moving on to step 8:
The number 401 fits into 2758 6 times, leaving a remainder of 352.
Put 6 as the next digit of the answer. 
Result so far: 166886.0
Subtracting 2406 from 2758 leaves us with 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Step 9:
When dividing 3520 by 401, we get 8 with a remainder of 312.
The next digit of our result is 8. 
Result so far: 166886.8
The remainder is 312 after subtracting 3208 from 3520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Going ahead to step 10:
If we divide 3120 by 401, we get 7 and a remainder of 313.
Record the quotient 7 as the next digit in the result. 
Result so far: 166886.87
If we take 2807 away from 3120, we end up with 313.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3130, and continue the process.

Let's proceed to step 11:
401 goes into 3130 7 times with a remainder of 323.
Use 7 as the next digit of our solution. 
Result so far: 166886.877
The remainder is 323 after subtracting 2807 from 3130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3230, and continue the process.

The quotient of the division is 166886.877, and the remainder is 0.0323.