77473021 ÷ 31 
We're looking to find how many times 31 goes into 77473021.

Advancing to step 1:
7 divided by 31 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 31

Let's proceed to step 2:
77 divided by 31 is 2 with a remainder of 15.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 62 away from 77, we end up with 15.
Grab the next digit (4) from the dividend, add it to 15, then carry on: 154 / 31

Let's proceed to step 3:
When dividing 154 by 31, we get 4 with a remainder of 30.
Record the quotient 4 as the next digit in the result. 
Result so far: 24.0
The remainder is 30 after subtracting 124 from 154.
Bring next digit (7) of the dividend behind the 30 and repeat the process: 307 / 31

Moving on to step 4:
307 divided by 31 is 9 with a remainder of 28.
Record the quotient 9 as the next digit in the result. 
Result so far: 249.0
Subtracting 279 from 307 leaves us with 28.
Bring next digit (3) of the dividend behind the 28 and repeat the process: 283 / 31

Moving on to step 5:
31 goes into 283 9 times with a remainder of 4.
Put 9 as the next digit of the answer. 
Result so far: 2499.0
If we take 279 away from 283, we end up with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 31

Step 6:
The number 31 fits into 40 1 times, leaving a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 24991.0
If we subtract 31 from 40, we get 9.
Append the next digit (2) from the dividend to 9 and continue with: 92 / 31

Moving on to step 7:
The number 31 fits into 92 2 times, leaving a remainder of 30.
Record the quotient 2 as the next digit in the result. 
Result so far: 249912.0
If we take 62 away from 92, we end up with 30.
Grab the next digit (1) from the dividend, add it to 30, then carry on: 301 / 31

Step 8:
The number 31 fits into 301 9 times, leaving a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 2499129.0
Deduct 279 from 301 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 9:
31 goes into 220 7 times with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 2499129.7
Subtracting 217 from 220 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 10:
31 can be fit into 30 0 times, resulting in a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 2499129.7
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 11:
The number 31 fits into 300 9 times, leaving a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 2499129.709
Deduct 279 from 300 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 12:
31 goes into 210 6 times with a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 2499129.7096
Subtracting 186 from 210 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 13:
When dividing 240 by 31, we get 7 with a remainder of 23.
Write down 7 as next digit of the result. 
Result so far: 2499129.70967
If we take 217 away from 240, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 14:
31 can be fit into 230 7 times, resulting in a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 2499129.709677
If we subtract 217 from 230, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final outcome is 2499129.709677, with a leftover of 1.3e-06.