There are 4 red balls, 6 white balls, and 6 yellow balls in the cloth bag. If you touch one of the balls, what is the probability of getting a red ball?
布袋里有4个红球，6个白球，6个黄球，现在从中摸一只，摸到红球的可能性是多少．
<gadget id="calculator">4 + 6 + 6</gadget>
<output>16</output>

<gadget id="calculator">4 / 16</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>