According to the ticket regulations of a movie theater, those under the age of 21 are 31 yuan per hour, and those who exceed the age of 21 will be charged an extra 2 yuan and 5 cents per minute. Yu, a college student, watched it for 1 hour and 46 minutes. How much did you spend in total?
某电影院门票规定，低于21岁的每小时31元，超出每分钟多收2元5角，大学生于某，看了1小时46分钟．一共花了多少钱？
<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 + (1/2)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">46 * (5/2)</gadget>
<output>115</output>

<gadget id="calculator">115 + 31</gadget>
<output>146</output>

<result>146</result>