The price of a smartphone is 1200 yuan, the price of a laptop is (1/4) more expensive than a smartphone, and the price of a TV is (1/5) more expensive than a laptop. How much does a TV set cost?
一智能手机的售价是1200元，一台笔记本电脑的售价比智能手机贵(1/4)，一台电视机的售价比笔记本电脑贵(1/5)．一台电视机的售价是多少钱？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1_200 * (5/4) * (6/5)</gadget>
<output>1_800</output>

<result>1_800</result>