When you need to divide a large number, use the multi-step process of long divison.

Here are two examples of long division.

Example 1:      

You want to find how many will be in each group when 78 is divided into 3 groups.

First set up the problem like this:

Ask yourself how many times 3 divides into the first digit.
3 divides into 7 at least two times, so write a 2 over the
7 in the ten’s place.

Now multiply 2 by 3. 2 × 3 = 6, so write the 6 under the 7 in the ten’s place.

Now subtract 6 from 7. 7 – 6 = 1, so write the 1 under the 6 in the ten’s place.

Now bring down the 8 to make 18.

Now divide 18 by 3. 18 ÷ 3 = 6, so write a 6 over the 8 in the one’s place.

Now multiply 6 by 3. 6 × 3 = 18, so write 18 under the 18 and subtract.