i dont understand the second section of this question

A pharmacist received a prescription for 100 mL of a cefuroxime axetil suspension to contain 300 mg of drug in each 5 mL. The pharmacist has 100 mL of a suspension containing 250 mg/5 mL and also has 250-mg scored tablets of the drug. How many tablets should be pulverized and added to the suspension to achieve the desired strength? Assume no increase in the volume of the suspension.

The pharmacist observed that after adding the pulverized tablets, the suspension measured 102 mL in volume. Calculations revealed that rather than the prescribed drug strength of 300 mg/5 mL, there were 294.1 mg/5 mL. What should the pharmacist do to bring the suspension to the desired strength?”