Dad bought a computer desk and chair for Xiaoliang. The price of the chair is 45 yuan, which is 12.5 yuan cheaper than the table. How much did Dad spend on this set of computer desks and chairs?
爸爸给小亮买了一套电脑桌椅，椅子的价钱是45元，比桌子便宜12.5元．爸爸买这套电脑桌椅用去多少元？
<gadget id="calculator">45 + 12.5 + 45</gadget>
<output>102.5</output>

<result>102.5</result>