A set of school uniform, jacket 58 yuan, trousers 42 yuan, how much is the total cost to buy 8 sets.
一套校服，上衣58元，裤子42元，购买8套一共需要多少元．
<gadget id="calculator">58 + 42</gadget>
<output>100</output>

<gadget id="calculator">100 * 8</gadget>
<output>800</output>

<result>800</result>