A piece of cylindrical steel is 80cm long and the radius of the bottom is 6cm. If the steel weighs 7.8g per cubic centimeter, what is the weight of this piece of steel?
一段圆柱体钢材，长80cm，底面半径6cm，如果每立方厘米的钢材重7.8g，这段钢材的重量是多少．
<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36 * 80</gadget>
<output>9_043.2</output>

<gadget id="calculator">9_043.2 * 7.8</gadget>
<output>70_536.96</output>

<result>70_536.96</result>