After 9 years, the sum of the ages of Xiaohong and her father is 70 years old. Now Xiaohong's age is the age of her father (3/10). How old is Xiaohong this year?
9年后，小红和爸爸的年龄之和是70岁，现在小红的年龄是爸爸年龄的(3/10)，小红今年有多少岁．
<gadget id="calculator">9 * 2</gadget>
<output>18</output>

<gadget id="calculator">70 - 18</gadget>
<output>52</output>

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

<gadget id="calculator">1 + (3/10)</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">52 / (13/10)</gadget>
<output>40</output>

<gadget id="calculator">40 * (3/10)</gadget>
<output>12</output>

<result>12</result>