We're dividing 53361890 by 261 
We want to figure out the number of times 53361890 can be divided by 261.

Advancing to step 1:
If we divide 5 by 261, we get 0 and a remainder of 5.
The next digit of our result is 0. 
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 / 261

On to step 2:
261 goes into 53 0 times with a remainder of 53.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 53 and we're left with 53.
Include the next digit (3) from the dividend after 53, then repeat: 533 / 261

Moving on to step 3:
533 divided by 261 is 2 with a remainder of 11.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 522 from 533 to get 11.
Take the next digit (6) from the dividend and append it to 11, then repeat: 116 / 261

Advancing to step 4:
When dividing 116 by 261, we get 0 with a remainder of 116.
The next digit of our result is 0. 
Result so far: 20.0
If we subtract 0 from 116, we get 116.
Include the next digit (1) from the dividend after 116, then repeat: 1161 / 261

Advancing to step 5:
1161 divided by 261 is 4 with a remainder of 117.
The next digit of our result is 4. 
Result so far: 204.0
If we subtract 1044 from 1161, we get 117.
Fetch the next digit (8) from the dividend, attach it to 117 and continue: 1178 / 261

On to step 6:
If we divide 1178 by 261, we get 4 and a remainder of 134.
The number 4 becomes the next digit in our result. 
Result so far: 2044.0
If we subtract 1044 from 1178, we get 134.
Include the next digit (9) from the dividend after 134, then repeat: 1349 / 261

On to step 7:
1349 divided by 261 is 5 with a remainder of 44.
The next digit of our result is 5. 
Result so far: 20445.0
If we subtract 1305 from 1349, we get 44.
Bring next digit (0) of the dividend behind the 44 and repeat the process: 440 / 261

On to step 8:
The number 261 fits into 440 1 times, leaving a remainder of 179.
The next digit of our result is 1. 
Result so far: 204451.0
The remainder is 179 after subtracting 261 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1790, and continue the process.

Going ahead to step 9:
The number 261 fits into 1790 6 times, leaving a remainder of 224.
Record the quotient 6 as the next digit in the result. 
Result so far: 204451.6
The remainder is 224 after subtracting 1566 from 1790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Advancing to step 10:
If we divide 2240 by 261, we get 8 and a remainder of 152.
Record the quotient 8 as the next digit in the result. 
Result so far: 204451.68
Subtracting 2088 from 2240 leaves us with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Let's proceed to step 11:
1520 divided by 261 is 5 with a remainder of 215.
Record the quotient 5 as the next digit in the result. 
Result so far: 204451.685
If we take 1305 away from 1520, we end up with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Step 12:
If we divide 2150 by 261, we get 8 and a remainder of 62.
Put 8 as the next digit of the answer. 
Result so far: 204451.6858
Subtracting 2088 from 2150 leaves us with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 13:
261 can be fit into 620 2 times, resulting in a remainder of 98.
The next digit of our result is 2. 
Result so far: 204451.68582
The remainder is 98 after subtracting 522 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Let's proceed to step 14:
If we divide 980 by 261, we get 3 and a remainder of 197.
The number 3 becomes the next digit in our result. 
Result so far: 204451.685823
If we subtract 783 from 980, we get 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

Moving on to step 15:
261 goes into 1970 7 times with a remainder of 143.
Use 7 as the next digit of our solution. 
Result so far: 204451.6858237
Subtracting 1827 from 1970 leaves us with 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

Step 16:
261 goes into 1430 5 times with a remainder of 125.
Use 5 as the next digit of our solution. 
Result so far: 204451.68582375
Subtracting 1305 from 1430 leaves us with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

The final result is 204451.68582375 with a remainder of 1.25e-07.