If the central angle of a fan is tripled and the radius is reduced to 1/3, what is the ratio of the area of the fan to the area of the original fan?
如果一个扇形的圆心角扩大为原来的3倍，半径长缩小为原来的(1/3)，那么所得的扇形面积与原来扇形的面积的比值为多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) / 1</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>