657300 ÷ 21 
We want to figure out the number of times 657300 can be divided by 21.

Step 1:
If we divide 6 by 21, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (5) from the dividend and append it to 6, then repeat: 65 / 21

Step 2:
21 goes into 65 3 times with a remainder of 2.
The next digit of our result is 3. 
Result so far: 3.0
If we take 63 away from 65, we end up with 2.
Append the next digit (7) from the dividend to 2 and continue with: 27 / 21

Step 3:
The number 21 fits into 27 1 times, leaving a remainder of 6.
Put 1 as the next digit of the answer. 
Result so far: 31.0
The remainder is 6 after subtracting 21 from 27.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 21

Let's proceed to step 4:
If we divide 63 by 21, we get 3 and a remainder of 0.
The next digit of our result is 3. 
Result so far: 313.0
Subtracting 63 from 63 leaves us with 0.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 21

Advancing to step 5:
The number 21 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 3130.0
Subtract 0 from 0 to get 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 21

Advancing to step 6:
0 divided by 21 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 31300.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 7:
When dividing 0 by 21, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 31300.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
When dividing 0 by 21, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 31300.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 31300.0 and a remainder of 0.0.