We look at the division of 77433417 by 521 
We're looking to find how many times 521 goes into 77433417.

Let's proceed to step 1:
When dividing 7 by 521, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 521

Moving on to step 2:
521 goes into 77 0 times with a remainder of 77.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 77 and we're left with 77.
Bring next digit (4) of the dividend behind the 77 and repeat the process: 774 / 521

Moving on to step 3:
The number 521 fits into 774 1 times, leaving a remainder of 253.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 521 from 774 and we're left with 253.
Take the next digit (3) from the dividend and append it to 253, then repeat: 2533 / 521

Moving on to step 4:
When dividing 2533 by 521, we get 4 with a remainder of 449.
Use 4 as the next digit of our solution. 
Result so far: 14.0
Deduct 2084 from 2533 and we're left with 449.
Grab the next digit (3) from the dividend, add it to 449, then carry on: 4493 / 521

Step 5:
When dividing 4493 by 521, we get 8 with a remainder of 325.
Write down 8 as next digit of the result. 
Result so far: 148.0
Subtract 4168 from 4493 to get 325.
Include the next digit (4) from the dividend after 325, then repeat: 3254 / 521

Let's proceed to step 6:
3254 divided by 521 is 6 with a remainder of 128.
The number 6 becomes the next digit in our result. 
Result so far: 1486.0
If we subtract 3126 from 3254, we get 128.
Take the next digit (1) from the dividend and append it to 128, then repeat: 1281 / 521

Advancing to step 7:
1281 divided by 521 is 2 with a remainder of 239.
Use 2 as the next digit of our solution. 
Result so far: 14862.0
Subtracting 1042 from 1281 leaves us with 239.
Include the next digit (7) from the dividend after 239, then repeat: 2397 / 521

Going ahead to step 8:
If we divide 2397 by 521, we get 4 and a remainder of 313.
Use 4 as the next digit of our solution. 
Result so far: 148624.0
Subtracting 2084 from 2397 leaves us 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 9:
The number 521 fits into 3130 6 times, leaving a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 148624.6
Deduct 3126 from 3130 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 10:
When dividing 40 by 521, we get 0 with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 148624.6
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 11:
When dividing 400 by 521, we get 0 with a remainder of 400.
Put 0 as the next digit of the answer. 
Result so far: 148624.6
Subtract 0 from 400 to get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final outcome is 148624.6, with a leftover of 0.04.