i'm programming with c++. can someone explain me this?

Instructions A size of a jumbo candy bar with rectangular shape is Ix wx h. Due to rising costs of cocoa, the volume of the candy bar is to be reduced by p96. To accomplish this, the management decided to keep the thickness, h, of the candy bar the same, and reduce the length and width by the same amount. For example, if I-12, w-7, h-3, and p- 10, then the new dimension of the candy bar is 11.39 x 6.64 x3 Write a program to accomplish this