The school library purchased 128 science books and story books each, 12.5 yuan for each science book, and 7.5 yuan for each story book. How much did the school spend on these books?
学校图书馆购进科技书和故事书各128本，科技书每本12.5元，故事书每本7.5元．学校买这些书一共花了多少元钱？
<gadget id="calculator">12.5 + 7.5</gadget>
<output>20</output>

<gadget id="calculator">20 * 128</gadget>
<output>2_560</output>

<result>2_560</result>