The school bought 45 copies of "One Hundred Thousand Little Whys" at 3.85 yuan each, 30 copies of "Grimm's Fairy Tales" at 4.20 yuan each, and 45 copies of "Robinson Crusoe" at 6.15 yuan each. How much did the school spend on these books?
学校买来《十万个小小为什么》45本，每本3.85元，《格林童话》30本，每本4.20元，《鲁滨孙漂流记》45本，每本6.15元．学校买这些书一共花了多少钱？
<gadget id="calculator">45 * 3.85</gadget>
<output>173.25</output>

<gadget id="calculator">30 * 4.2</gadget>
<output>126</output>

<gadget id="calculator">45 * 6.15</gadget>
<output>276.75</output>

<gadget id="calculator">173.25 + 126 + 276.75</gadget>
<output>576</output>

<result>576</result>