In mendelian dihybrid cross, what is the probability of formation of double homozygous individuals in F2 generation?

In Mendel's each Monohybrid cross the probability of formation of homozygous individuals in F2generation is 24. In Dihybrid cross, the formation of double homozygous individuals is the product of probability of formation of homozygous individuals of the two monohybrid crosses together. i.e. 24 × 24 = 416