If the radius of the base of a cylinder is tripled and the height is reduced to 1/3, how many times will its volume be enlarged?
如果一个圆柱体的底面半径扩大3倍，高缩小到原来的(1/3)，那么它的体积扩大多少倍
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<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>