The "Youth Science and Technology Innovation Contest" received a total of 1,200 works, of which . Those who won the "first prize" accounted for 5%, those who won the "second prize" accounted for (1/15), and those who won the "third prize" accounted for 15%. Please propose a two-step or more calculation based on the relevant information Parallel solution to the problem.
"青少年科技创新大赛"共收到1200幅作品，其中．获"一等奖"的占5%，获"二等奖"的占(1/15)，获"三等奖"的占15%，请你根据有关信息提出一个两步或两步以上计算的问题并列式解答．
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(1/20) + (1/15) + (3/20)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">1_200 * (4/15)</gadget>
<output>320</output>

<result>320</result>