How many cubes with side lengths of \dfrac14\text{ cm} 4 1 cmstart fraction, 1, divided by, 4, end fraction, start text, space, c, m, end text does it take to fill the prism

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?