There is a point inside the triangle ABC, the length of the perpendicular line segment from this point to the three sides of the triangle is 4 cm, and the perimeter of the triangle is 26 cm, what is the area of the triangle ABC in square centimeters?
在三角形ABC内部有一点，这点到三角形三条边的垂线段长都是4厘米，又知道三角形的周长是26厘米，那么三角形ABC的面积是多少平方厘米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 26 * 4</gadget>
<output>52</output>

<result>52</result>