Xiaohong wants to make a cup of 220 grams of salt water, and the mass ratio of salt to water is 1:10. How many grams of salt does she need to put?
小红要冲一杯220克的盐水，其中盐与水的质量比是1：10，她需要放多少克的盐？
<gadget id="calculator">1 + 10</gadget>
<output>11</output>

<gadget id="calculator">1 / 11</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">220 * (1/11)</gadget>
<output>20</output>

<result>20</result>