Jessa needs to make cupcakes for 3 fourth-grade classes that each have 30 students and a P.E. class with 50 students. How many cupcakes does she need to make?
For the fourth-grade classes, Jessa needs 3 classes * 30 cupcakes/class = 
<gadget id="calculator">3*30</gadget>
<output>90</output>
90 cupcakes.
Adding the cupcakes for the P.E. class 50, she needs to make a total of 90 cupcakes + 50 cupcakes = 
<gadget id="calculator">90+50</gadget>
<output>140</output>
140 cupcakes.

<result>140</result>