The shape of the floor of Xiao Ming's bedroom is a square with a side length of 3m. Use isosceles triangular tiles with a base of 40cm and a height of 25cm to pave the floor. The price of each tile is 7.2 yuan. How much is the minimum cost to buy tiles?
小明卧室地面的形状是正方形，边长是3m．用底是40cm，高是25cm的等腰三角形瓷砖铺地面，每块瓷砖的价格是7.2元，买瓷砖至少需要多少元？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) / 2</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(2/5) * (1/8)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">3 / (1/20)</gadget>
<output>60</output>

<gadget id="calculator">3 * 60 * 7.2</gadget>
<output>1_296</output>

<result>1_296</result>