There is a cone-like wheat pile on the threshing floor with a total weight of 4 tons. If 2 tons of wheat are added to the pile and the height of the shape remains unchanged, the radius of the bottom surface of the wheat pile increases by (1/2) times. Then the wheat pile How much has the volume increased.
打谷场上有一近似圆锥的小麦堆共重4吨，若再堆加2吨小麦在形状高度不变的情况下，麦堆的底面半径增加了(1/2)倍，那么这时小麦堆的体积增加了多少．
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<result>5/4 = around 1.25</result>