2ab - the product is the result of multiplying. Therefore the product of a and b is ab. Twice the product is therefore 2ab.
The product in Maths is a number that you get by adding or deducting the numbers. Plus, or Minus is an important part of maths. Learning and understanding how to find the product in maths is an important foundation for developing their skills in maths.
Assuming you are referring to the Maths B subject in Queensland High Schools. Maths B is the second authority (OP) Maths subject in the State Curriculum (also referred to as "difficult Maths". It is preceded by Maths A (really easy maths [there is a massive difference between A and B) and succeeded by Maths C (Incredibly difficult maths). In Maths B (11 and 12) you typically study Periodic Functions, Statistics, Exponential functions, Logarithmic Functions, Differentiation, Integration (indefinite and definite), and a bit of probability.
product means X in maths
It means multiplication
It is twice 78,055 equals 156,110
Level A maths is the hardest maths you can get. Level B maths is not so hard and level C maths is about the same as primary school maths.