For a cylinder, if the radius of the bottom surface increases by 3cm, the side area increases by 75.36cm**2; if the height increases by 3cm, the side area increases by 94.2cm**2. Find the volume of the original cylinder.
一个圆柱，如果底面半径增加3cm，侧面积就增加75.36cm**2；如果高增加3cm，侧面积就增加94.2cm**2，求原圆柱的体积．
<gadget id="calculator">94.2 / 3 / 3.14 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 3 * 2</gadget>
<output>18.84</output>

<gadget id="calculator">75.36 / 18.84</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 25 * 4</gadget>
<output>314</output>

<result>314</result>