The weight of a bag of rice is equal to its own (9/10) plus (9/10) kg, what is the weight of this bag of rice?
一袋米的重量等于它本身的(9/10)加上(9/10)千克，这袋米的重量是多少．
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

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

<result>9</result>