The nectar collected by bees contains 30% honey, and 6 kg of nectar containing 72% honey is made from this nectar. How many kilograms of this nectar are needed?
蜜蜂采的花蜜中含蜜30%，用这种花蜜制成含蜜72%的花蜜6千克，只需这种花蜜多少千克？
<gadget id="calculator">72 / 100</gadget>
<output>18/25 = around 0.72</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(18/25) / (3/10)</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">6 * (12/5)</gadget>
<output>72/5 = around 14.4</output>

<result>72/5 = around 14.4</result>