A bag of rice is 10 kilograms, after eating (1/10), there is still ((())/(())) of this bag of rice, how many kilograms are left.
一袋大米10千克，吃了(1/10)，还剩这袋大米的((())/(()))，还剩多少千克．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">10 * (9/10)</gadget>
<output>9</output>

<result>9</result>