A bag of flour, used every day (1/9), how much is used in a week
一袋面粉，每天用去(1/9)，一周用去多少
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(1/9) * 7</gadget>
<output>7/9 = around 0.777778</output>

<result>7/9 = around 0.777778</result>