Five coaster vans are used to transport students for their field trip. Each van carries 28 students, 60 of which are boys. How many are girls?
There are a total of 5 vans x 28 students = 
<gadget id="calculator">5*28</gadget>
<output>140</output>
140 students.
If 60 are boys, then 140 - 60 = 
<gadget id="calculator">140-60</gadget>
<output>80</output>
80 of these students are girls.

<result>80</result>