Zhang Chao bought 5 comic books at 3 yuan and 2.5 cents each. How much did they cost in total?
张超买了5本连环画，每本3元2角5分，一共要用多少钱？
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">3 + (1/5) + (1/20)</gadget>
<output>13/4 = around 3.25</output>

<gadget id="calculator">5 * (13/4)</gadget>
<output>65/4 = around 16.25</output>

<result>65/4 = around 16.25</result>