In the first few problems, now that you are familiar with the basic mechanics of WeBWorK, you will be asked to evaluate some arithmetic expressions and enter the answer as a number into WeBWorK. You may of course use a calculator. In later problems you will be able to enter the answer as an arithmetic expression, but at present your answer must be a number such as 4, -4, or 17.5.
Evaluate the expression
$3(6+3)$ = . (Remember that by convention a missing arithmetic operator means multiplication .)