Miss Adamson has four classes with 20 students each. She makes a study guide for her class and uses 5 sheets of paper per student. How many sheets of paper will she use for all of her students?
Miss Adamson has a total of 4 x 20 = 
<gadget id="calculator">4*20</gadget>
<output>80</output>
80 students.
Thus, she will use 80 x 5 = 
<gadget id="calculator">80*5</gadget>
<output>400</output>
400 sheets of paper for all of her students.

<result>400</result>