54199210 divided by 770 
We want to figure out the number of times 54199210 can be divided by 770.

Let's proceed to step 1:
770 goes into 5 0 times with 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 (4) from the dividend and append it to 5, then repeat: 54 / 770

Going ahead to step 2:
The number 770 fits into 54 0 times, leaving a remainder of 54.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 54 leaves us with 54.
Bring next digit (1) of the dividend behind the 54 and repeat the process: 541 / 770

Advancing to step 3:
770 goes into 541 0 times with a remainder of 541.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 541, we end up with 541.
Fetch the next digit (9) from the dividend, attach it to 541 and continue: 5419 / 770

Going ahead to step 4:
770 goes into 5419 7 times with a remainder of 29.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we subtract 5390 from 5419, we get 29.
Include the next digit (9) from the dividend after 29, then repeat: 299 / 770

Advancing to step 5:
299 divided by 770 is 0 with a remainder of 299.
The number 0 becomes the next digit in our result. 
Result so far: 70.0
Subtract 0 from 299 to get 299.
Append the next digit (2) from the dividend to 299 and continue with: 2992 / 770

On to step 6:
When dividing 2992 by 770, we get 3 with a remainder of 682.
Use 3 as the next digit of our solution. 
Result so far: 703.0
Subtract 2310 from 2992 to get 682.
Bring next digit (1) of the dividend behind the 682 and repeat the process: 6821 / 770

Moving on to step 7:
6821 divided by 770 is 8 with a remainder of 661.
Write down 8 as next digit of the result. 
Result so far: 7038.0
If we take 6160 away from 6821, we end up with 661.
Fetch the next digit (0) from the dividend, attach it to 661 and continue: 6610 / 770

Going ahead to step 8:
When dividing 6610 by 770, we get 8 with a remainder of 450.
Use 8 as the next digit of our solution. 
Result so far: 70388.0
Subtracting 6160 from 6610 leaves us with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Let's proceed to step 9:
If we divide 4500 by 770, we get 5 and a remainder of 650.
The next digit of our result is 5. 
Result so far: 70388.5
The remainder is 650 after subtracting 3850 from 4500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6500, and continue the process.

Step 10:
6500 divided by 770 is 8 with a remainder of 340.
Write down 8 as next digit of the result. 
Result so far: 70388.58
Subtracting 6160 from 6500 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

On to step 11:
3400 divided by 770 is 4 with a remainder of 320.
Put 4 as the next digit of the answer. 
Result so far: 70388.584
If we take 3080 away from 3400, we end up with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Moving on to step 12:
When dividing 3200 by 770, we get 4 with a remainder of 120.
Put 4 as the next digit of the answer. 
Result so far: 70388.5844
If we subtract 3080 from 3200, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

The final outcome is 70388.5844, with a leftover of 0.0012.