53990143 ÷ 166 
We're looking to find how many times 166 goes into 53990143.

Let's proceed to step 1:
If we divide 5 by 166, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 166

Let's proceed to step 2:
When dividing 53 by 166, we get 0 with a remainder of 53.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 53 leaves us with 53.
Grab the next digit (9) from the dividend, add it to 53, then carry on: 539 / 166

On to step 3:
If we divide 539 by 166, we get 3 and a remainder of 41.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 41 after subtracting 498 from 539.
Bring next digit (9) of the dividend behind the 41 and repeat the process: 419 / 166

On to step 4:
The number 166 fits into 419 2 times, leaving a remainder of 87.
The next digit of our result is 2. 
Result so far: 32.0
The remainder is 87 after subtracting 332 from 419.
Grab the next digit (0) from the dividend, add it to 87, then carry on: 870 / 166

On to step 5:
870 divided by 166 is 5 with a remainder of 40.
The next digit of our result is 5. 
Result so far: 325.0
Subtracting 830 from 870 leaves us with 40.
Append the next digit (1) from the dividend to 40 and continue with: 401 / 166

Let's proceed to step 6:
166 can be fit into 401 2 times, resulting in a remainder of 69.
Use 2 as the next digit of our solution. 
Result so far: 3252.0
If we subtract 332 from 401, we get 69.
Include the next digit (4) from the dividend after 69, then repeat: 694 / 166

Moving on to step 7:
166 goes into 694 4 times with a remainder of 30.
Write down 4 as next digit of the result. 
Result so far: 32524.0
If we subtract 664 from 694, we get 30.
Append the next digit (3) from the dividend to 30 and continue with: 303 / 166

On to step 8:
When dividing 303 by 166, we get 1 with a remainder of 137.
The number 1 becomes the next digit in our result. 
Result so far: 325241.0
Deduct 166 from 303 and we're left with 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

Going ahead to step 9:
If we divide 1370 by 166, we get 8 and a remainder of 42.
Record the quotient 8 as the next digit in the result. 
Result so far: 325241.8
If we take 1328 away from 1370, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 10:
166 can be fit into 420 2 times, resulting in a remainder of 88.
Put 2 as the next digit of the answer. 
Result so far: 325241.82
If we subtract 332 from 420, we get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Going ahead to step 11:
166 goes into 880 5 times with a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 325241.825
If we take 830 away from 880, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 12:
If we divide 500 by 166, we get 3 and a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 325241.8253
If we subtract 498 from 500, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 13:
20 divided by 166 is 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 325241.8253
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 14:
The number 166 fits into 200 1 times, leaving a remainder of 34.
Put 1 as the next digit of the answer. 
Result so far: 325241.825301
Deduct 166 from 200 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 15:
When dividing 340 by 166, we get 2 with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 325241.8253012
Subtracting 332 from 340 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 16:
80 divided by 166 is 0 with a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 325241.8253012
If we take 0 away from 80, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The quotient of the division is 325241.8253012, and the remainder is 8e-08.