Cut a conical pastry in half along the height perpendicular to the bottom surface, the surface area increases by 36cm**2 compared to the original one, the measured height of the conical pastry is 9cm, what is the original volume of the pastry in cm**3.
将一块圆锥形糕点沿着高垂直于底面切成两半，表面积比原来增加了36cm**2，测得圆锥形糕点的高是9cm，原来这块糕点的体积是多少cm**3．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<gadget id="calculator">2 / 9 / 2</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">18 * (1/9)</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * 9</gadget>
<output>37.68</output>

<result>37.68</result>