There is a conical flask with a bottom radius of 3cm and a height of 10cm, which is filled with 75% alcohol. Now pour all the alcohol into a cylindrical beaker with the same bottom and the same height, and fill it with water. Ask, the alcohol in the beaker What is the concentration?
有一个底面半径为3cm，高10cm的锥形瓶，里面装满浓度为75%的酒精，现在将酒精全部倒入同底等高的圆柱形烧杯中，加满水，问，烧杯中的酒精浓度为多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * 10 * (3/4)</gadget>
<output>70.65</output>

<gadget id="calculator">3.14 * 9 * 10</gadget>
<output>282.6</output>

<gadget id="calculator">70.65 / 282.6</gadget>
<output>0.25</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">0.25 * 1</gadget>
<output>0.25</output>

<result>0.25</result>