To divide and round up a number in Excel, you can use the `CEILING` function. Here's how you can modify your formula to achieve the desired result:

1. Start by typing your original formula in a cell, for example,
   Code:

   =C5/4

   .
2. To round up the result to the nearest whole number, wrap the formula in the
   Code:

   CEILING

   function. The syntax for the
   Code:

   CEILING

   function is
   Code:

   CEILING(number, significance)

   , where
   Code:

   number

   is the value you want to round up and
   Code:

   significance

   is the multiple to which you want to round up. In this case, we want to round up to the nearest whole number, so we'll use
   Code:

   1

   as the significance. The modified formula will look like this:
   Code:

   =CEILING(C5/4,1)

   .
3. Press Enter to calculate the result. The formula will divide the value in cell C5 by 4, then round up the result to the nearest whole number.

For example, if the value in cell C5 is 69, the formula will return 18, which is the result of dividing 69 by 4 and rounding up to the nearest whole number.