In a glass of salt water, the mass ratio of salt to water is 1:10. After adding 22g of salt, the mass ratio of salt to water is 2:9. How many grams of salt water are in the glass?
一杯盐水中，盐与水的质量比是1：10，加进22g盐后，盐与水的质量比是2：9，杯子中原有盐水多少克？
<gadget id="calculator">20 - 9</gadget>
<output>11</output>

<gadget id="calculator">22 / 11</gadget>
<output>2</output>

<gadget id="calculator">2 * 9</gadget>
<output>18</output>

<result>18</result>