A set of 7 spoons costs $21. If each spoon would be sold separately, how much would 5 spoons cost?
A set of 7 spoons costs $21, so one spoon from the set costs 21 / 7 = $
<gadget id="calculator">21/7</gadget>
<output>3</output>
3.
So if sold separately, 5 spoons would cost 5 * 3 = $
<gadget id="calculator">5*3</gadget>
<output>15</output>
15.

<result>15</result>