"Six Day" Children's Day is here, Mr. Guo went to buy prizes, and it cost 57.6 yuan to buy a notebook. The money to buy a pen was 23.7 yuan less than the money to buy a notebook. How much did Mr. Guo spend on all the prizes?
"六一"儿童节到了，郭老师去购买奖品，买笔记本用去57.6元，买钢笔的钱比买笔记本的钱少23.7元，郭老师买奖品一共用去多少元？
<gadget id="calculator">33.9 + 57.6</gadget>
<output>91.5</output>

<result>91.5</result>