Camp Cedar has 40 boys, it has 3 times as many girls.  It needs 1 counselor for every 8 children.  How many counselors does Camp Cedar need?
Camp has 3 * 40 boys = 
<gadget id="calculator">3*40</gadget>
<output>120</output>
120 girls.
Camp Cedar has a total of 40 boys + 120 girls = 
<gadget id="calculator">40+120</gadget>
<output>160</output>
160 children.
Camp needs 1 counselor per 8 children, so 160 children / 8 children = 
<gadget id="calculator">160/8</gadget>
<output>20</output>
20 counselors needed.

<result>20</result>