A rectangular steel plate is 12 meters long and 8 meters wide. After cutting a triangular steel plate with a base of 4 meters and a height of 5 meters from this steel plate, what is the area of the remaining steel plate in square meters?
一块长方形钢板，长12米，宽8米，从这块钢板上截下一块底4米，高5米的三角形钢板后，剩下的钢板面积是多少平方米？
<gadget id="calculator">12 * 8</gadget>
<output>96</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

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

<gadget id="calculator">96 - 10</gadget>
<output>86</output>

<result>86</result>