The library of Shengli Primary School bought 20 books (Story of a Mathematician) at 4.80 yuan each, and 15 books (Children's Ballads) at 2.40 yuan each. How much did you spend in total?
胜利小学图书馆买了20本(数学家的故事)每本4.80元，买了15本(儿童歌谣)，每本2.40元，一共用去多少元？
<gadget id="calculator">20 * 4.8</gadget>
<output>96</output>

<gadget id="calculator">15 * 2.4</gadget>
<output>36</output>

<gadget id="calculator">96 + 36</gadget>
<output>132</output>

<result>132</result>