"Little Newton" is 87.5 yuan per set, and "Up and Down Five Thousand Years" is 62.5 yuan per set. If you buy 4 sets of each of the two books, how much is the total cost?
《小牛顿》87.5元/套，《上下五千年》62.5元/套，两种书各买4套，一共需要多少元？
<gadget id="calculator">87.5 + 62.5</gadget>
<output>150</output>

<gadget id="calculator">150 * 4</gadget>
<output>600</output>

<result>600</result>