A cylindrical oil reservoir with a bottom radius of 5 cm, steel balls are immersed in the oil, if 546π grams of steel balls are removed from it, how many centimeters does the liquid level drop? (1cm**3 steel ball is 7.8g).
一个底面半径为5厘米的圆柱形储油器，油液中浸有钢珠，若从中捞出546π克钢珠，问液面下降了多少厘米？(1cm**3钢珠为7.8g)．
<gadget id="calculator">3.14 / 7.8</gadget>
<output>0.402564</output>

<gadget id="calculator">546 * 0.402564</gadget>
<output>219.799944</output>

<gadget id="calculator">3.14 * 5 * 5</gadget>
<output>78.5</output>

<gadget id="calculator">219.799944 / 78.5</gadget>
<output>2.799999</output>

<result>2.799999</result>