A newspaper subscription costs $10/month. If you purchase an annual subscription you obtain a 20% discount on your total bill. How much do you end up paying if you go with the annual subscription?
A year has 12 months. If 1 month costs $10, then a year will cost $12 * 10 = $
<gadget id="calculator">12*10</gadget>
<output>120</output>
120 per year without an annual subscription.
If the annual subscription has a 20% discount then you would pay $120 * (1-20%) = $
<gadget id="calculator">120*(1-20*.01)</gadget>
<output>96</output>
96 for the annual subscription.

<result>96</result>