Honey collected by bees contains 70% water. The honey that bees make from this nectar contains only 19% water. How many grams of nectar does a bee need to produce 1 kg of honey?
蜜蜂采的花蜜中含有70%的水份．蜜蜂用这种花蜜酿成的蜂蜜只含有19%的水份．蜜蜂酿1千克的蜂蜜，需要采多少克花蜜．
<gadget id="calculator">19 / 100</gadget>
<output>19/100 = around 0.19</output>

<gadget id="calculator">1 - (19/100)</gadget>
<output>81/100 = around 0.81</output>

<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">1 - (7/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(81/100) / (3/10)</gadget>
<output>27/10 = around 2.7</output>

<gadget id="calculator">1 * 1_000 * (27/10)</gadget>
<output>2_700</output>

<result>2_700</result>