There are 9 white balls and 6 yellow balls in a box, what is the probability of touching the white ball?
一人盒子里有9个白球，6个黄球，摸到白球的可能性是多少．
<gadget id="calculator">9 + 6</gadget>
<output>15</output>

<gadget id="calculator">9 / 15</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>