You dont there is no way to. You just say 70x114=7980
When you multiply exponential expressions that have the same base, you simply add the exponents. This is true for both numbers and variables. When you include other numbers in the multiplication, you simply factor and break the expression into several multiplications.
2^5 * 2^x= 2^(5 + X)
I would say B; trapezoid. That is what it appears as.