A piece of cylindrical plasticine with a length of 4 cm is kneaded into a cone with a height of 4 cm. The area of the bottom of the cone is 9 square centimeters. What is the area of the bottom of the cylindrical plasticine in square centimeters?
把一块长4厘米的圆柱形橡皮泥，捏成一个高为4厘米的圆锥体，圆锥体的底面积是9平方厘米，那么圆柱形橡皮泥的底面积是多少平方厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<result>3</result>