There is 1 red ball in a pocket, and the number of white balls is 6 times that of red balls, what is the probability of touching the white ball?
一个口袋里有1个红球，白球是红球的6倍，摸到白球的可能性是多少．
<gadget id="calculator">1 * 6</gadget>
<output>6</output>

<gadget id="calculator">1 + 6</gadget>
<output>7</output>

<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<result>6/7 = around 0.857143</result>