There are 1600 grams of sugar water, containing 5% sugar, how many grams of sugar should be added to make the weight ratio of sugar to water 1:10.
有1600克糖水，含糖5%，要使糖与水的重量比成为1：10，需要加入多少克糖．
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1_600 * (1/20)</gadget>
<output>80</output>

<gadget id="calculator">1_600 - 80</gadget>
<output>1_520</output>

<gadget id="calculator">1_520 / 10</gadget>
<output>152</output>

<gadget id="calculator">152 - 80</gadget>
<output>72</output>

<result>72</result>