The sum of the sides of a cube is 36 cm, find its volume. If each cubic centimeter of steel weighs 7.8 grams, how many kilograms does this piece of steel weigh?
一块正方体钢材棱长的和是36厘米，求它的体积．如果每立方厘米钢材重7.8克，这块钢材重多少千克？
<gadget id="calculator">36 / 12</gadget>
<output>3</output>

<gadget id="calculator">7.8 / 1_000</gadget>
<output>0.0078</output>

<gadget id="calculator">3 * 3 * 3 * 0.0078</gadget>
<output>0.2106</output>

<result>0.2106</result>