The length of a rectangular flat steel plate is 1.5 meters and the height is 0.8 meters. A triangular steel plate with a base length of 4 decimeters and a height of 5 decimeters is cut from this steel plate. What is the area of the remaining steel plate in square meters?
一块长方形平面钢板的长是1.5米，高是0.8米，从这块钢板上截下一块底长4分米，高5分米的三角形钢板，剩下钢板的面积是多少平方米？
<gadget id="calculator">1.5 * 0.8</gadget>
<output>1.2</output>

<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) / 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) * (1/4)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1.2 - (1/10)</gadget>
<output>1.1</output>

<result>1.1</result>