58221361 ÷ 129 
We want to figure out the number of times 58221361 can be divided by 129.

Moving on to step 1:
When dividing 5 by 129, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (8) from the dividend to 5 and continue with: 58 / 129

Advancing to step 2:
129 can be fit into 58 0 times, resulting in a remainder of 58.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 58 and we're left with 58.
Append the next digit (2) from the dividend to 58 and continue with: 582 / 129

Advancing to step 3:
The number 129 fits into 582 4 times, leaving a remainder of 66.
Write down 4 as next digit of the result. 
Result so far: 4.0
The remainder is 66 after subtracting 516 from 582.
Take the next digit (2) from the dividend and append it to 66, then repeat: 662 / 129

Moving on to step 4:
129 can be fit into 662 5 times, resulting in a remainder of 17.
Use 5 as the next digit of our solution. 
Result so far: 45.0
Deduct 645 from 662 and we're left with 17.
Take the next digit (1) from the dividend and append it to 17, then repeat: 171 / 129

Advancing to step 5:
When dividing 171 by 129, we get 1 with a remainder of 42.
Record the quotient 1 as the next digit in the result. 
Result so far: 451.0
Deduct 129 from 171 and we're left with 42.
Include the next digit (3) from the dividend after 42, then repeat: 423 / 129

Going ahead to step 6:
423 divided by 129 is 3 with a remainder of 36.
The next digit of our result is 3. 
Result so far: 4513.0
Subtracting 387 from 423 leaves us with 36.
Bring next digit (6) of the dividend behind the 36 and repeat the process: 366 / 129

Advancing to step 7:
129 goes into 366 2 times with a remainder of 108.
Put 2 as the next digit of the answer. 
Result so far: 45132.0
Subtract 258 from 366 to get 108.
Append the next digit (1) from the dividend to 108 and continue with: 1081 / 129

Advancing to step 8:
If we divide 1081 by 129, we get 8 and a remainder of 49.
Put 8 as the next digit of the answer. 
Result so far: 451328.0
Deduct 1032 from 1081 and we're left with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Step 9:
129 can be fit into 490 3 times, resulting in a remainder of 103.
Write down 3 as next digit of the result. 
Result so far: 451328.3
Subtract 387 from 490 to get 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Moving on to step 10:
When dividing 1030 by 129, we get 7 with a remainder of 127.
The next digit of our result is 7. 
Result so far: 451328.37
The remainder is 127 after subtracting 903 from 1030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

Advancing to step 11:
129 can be fit into 1270 9 times, resulting in a remainder of 109.
The number 9 becomes the next digit in our result. 
Result so far: 451328.379
Subtract 1161 from 1270 to get 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Advancing to step 12:
129 can be fit into 1090 8 times, resulting in a remainder of 58.
The next digit of our result is 8. 
Result so far: 451328.3798
If we take 1032 away from 1090, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 13:
580 divided by 129 is 4 with a remainder of 64.
Put 4 as the next digit of the answer. 
Result so far: 451328.37984
The remainder is 64 after subtracting 516 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 14:
If we divide 640 by 129, we get 4 and a remainder of 124.
Use 4 as the next digit of our solution. 
Result so far: 451328.379844
The remainder is 124 after subtracting 516 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

After the division, we end up with 451328.379844 and a remainder of 1.24e-05.