During the "June 1st" party, the teacher went to buy prizes. He bought 18 prizes for 2.5 yuan and 36 prizes for 1.8 yuan. How much did the teacher spend in total?
"六一节"联欢会时，老师去买奖品，2.5元的奖品买了18份，1.8元的奖品买了36份，老师一共花了多少钱？
<gadget id="calculator">2.5 * 18</gadget>
<output>45</output>

<gadget id="calculator">1.8 * 36</gadget>
<output>64.8</output>

<gadget id="calculator">45 + 64.8</gadget>
<output>109.8</output>

<result>109.8</result>