There is a cylindrical container with a bottom area of 20 square centimeters, which is filled with kerosene, and steel balls are immersed in the oil. If 546 grams of steel balls are taken out of the container, how many centimeters will the liquid level drop? (One cubic centimeter of steel ball weighs 7.8 grams)
有一个底面积为20平方厘米的圆柱形容器，装有煤油，油中浸有钢质小球，若从中捞出546克钢质小球，液面将下降多少厘米．(一立方厘米的钢质小球重7.8克)
<gadget id="calculator">546 / 7.8</gadget>
<output>70</output>

<gadget id="calculator">70 / 20</gadget>
<output>7/2 = around 3.5</output>

<result>7/2 = around 3.5</result>