A rectangular iron plate is 1.2 meters long and 0.8 meters wide. After cutting off a triangular plate with a base length of 0.4 meters and a height of 0.5 meters from this iron plate, what is the area of the remaining iron plate in square meters?
一块长方形铁板，长1.2米，宽0.8米．从这块铁板上截下一块底长0.4米，高0.5米的三角形板后，剩下的铁板面积是多少平方米？
<gadget id="calculator">1.2 * 0.8</gadget>
<output>0.96</output>

<gadget id="calculator">0.5 / 2</gadget>
<output>0.25</output>

<gadget id="calculator">0.4 * 0.25</gadget>
<output>0.1</output>

<gadget id="calculator">0.96 - 0.1</gadget>
<output>0.86</output>

<result>0.86</result>