I assume you mean 3(16^7-39)?
16^7 is 268435456
268435456-39 is 268435417
268435417 multiplied by 3 is 805306251
Hope this helped.
Answer:
33 cubic unit
Step-by-step explanation:
Volume of the prism = base area * height
= 9 * 3 2/3 {Change improper to proper fraction}

You could put,
19
+ 6
———
25
Then write,
19+6=25