We divide 66153932 by 400
The aim is to understand the frequency of 400 in 66153932.

Advancing to step 1:
If we divide 6 by 400, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 400

Let's proceed to step 2:
If we divide 66 by 400, we get 0 and a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Bring next digit (1) of the dividend behind the 66 and repeat the process: 661 / 400

Advancing to step 3:
When dividing 661 by 400, we get 1 with a remainder of 261.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 400 from 661 to get 261.
Grab the next digit (5) from the dividend, add it to 261, then carry on: 2615 / 400

Advancing to step 4:
If we divide 2615 by 400, we get 6 and a remainder of 215.
Use 6 as the next digit of our solution. 
Result so far: 16.0
If we subtract 2400 from 2615, we get 215.
Grab the next digit (3) from the dividend, add it to 215, then carry on: 2153 / 400

Advancing to step 5:
400 goes into 2153 5 times with a remainder of 153.
The number 5 becomes the next digit in our result. 
Result so far: 165.0
If we take 2000 away from 2153, we end up with 153.
Grab the next digit (9) from the dividend, add it to 153, then carry on: 1539 / 400

Moving on to step 6:
The number 400 fits into 1539 3 times, leaving a remainder of 339.
Record the quotient 3 as the next digit in the result. 
Result so far: 1653.0
If we subtract 1200 from 1539, we get 339.
Include the next digit (3) from the dividend after 339, then repeat: 3393 / 400

Advancing to step 7:
When dividing 3393 by 400, we get 8 with a remainder of 193.
Use 8 as the next digit of our solution. 
Result so far: 16538.0
Subtracting 3200 from 3393 leaves us with 193.
Bring next digit (2) of the dividend behind the 193 and repeat the process: 1932 / 400

Advancing to step 8:
400 goes into 1932 4 times with a remainder of 332.
The number 4 becomes the next digit in our result. 
Result so far: 165384.0
If we take 1600 away from 1932, we end up with 332.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3320, and continue the process.

Moving on to step 9:
The number 400 fits into 3320 8 times, leaving a remainder of 120.
Use 8 as the next digit of our solution. 
Result so far: 165384.8
Deduct 3200 from 3320 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 10:
The number 400 fits into 1200 3 times, leaving a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 165384.83
The remainder is 0 after subtracting 1200 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 11:
The number 400 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 165384.83
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 12:
The number 400 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 165384.83
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 165384.83 and a remainder of 0.0.