There are 1 yellow ball and 8 white balls, what is the probability of touching the yellow ball
有1个黄球8个白球，摸到黄球的可能性是多少
<gadget id="calculator">1 + 8</gadget>
<output>9</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<result>1/9 = around 0.111111</result>