Our school needs to buy two new children's books for the library. "Fairy Tales" is 85 yuan per set, and "Selected Compositions" is 79 yuan per set. There are 4 sets of each. How much is the total cost?
我校要为图书室新购两种少儿读物，《童话故事》每套85元，《作文选》每套79元，每种4套，一共需要多少元？
<gadget id="calculator">85 + 79</gadget>
<output>164</output>

<gadget id="calculator">164 * 4</gadget>
<output>656</output>

<result>656</result>