The base of a triangle is 4cm, if the base is reduced by 1cm, the area of the triangle is reduced by 1.5cm**2. What is the area of the original triangle in square centimeters?
一个三角形的底是4cm，如果底减少1cm，那么三角形的面积就减少1.5cm**2．原来三角形的面积是多少平方厘米？
<gadget id="calculator">2 / 1</gadget>
<output>2</output>

<gadget id="calculator">1.5 * 2</gadget>
<output>3</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">4 * (3/2)</gadget>
<output>6</output>

<result>6</result>